Un acróbata de masa M, se impulsa hacia arriba con una velocidad v0 desde un
trampolín. Mientras sube, a una altura h sobre el trampolín, recoge a un mono entrenado de masa m. ¿Cuál es la altura máxima que alcanzan el mono y el acróbata?
Answer:
La altura máxima que alcanzan el mono y el acróbata es [tex]z = \frac{1}{2}\cdot \left(\frac{M}{M+m} \right)\cdot v_{o}^{2}+\left(1-\frac{M\cdot g}{M+m} \right)\cdot h[/tex].
Explanation:
Asumamos que tanto el acróbata, el mono y el sistema acróbata-mono son conservativos y que el acróbata comienza su acción a una altura de cero. El estudio se divide en dos etapas: (i) El acróbata se dirige al mono, (ii) El acróbata recoge al mono y alcanzan una altura máxima.
Para resolver esta cuestión, nos valemos del Principio de Conservación de la Energía.
Parte I
La energía cinética traslacional inicial ([tex]K_{1,a}[/tex]) es igual a la suma de la energía cinética traslacional final ([tex]K_{2, a}[/tex]) y la energía potencial gravitacional final ([tex]U_{g,2,a}[/tex]).
[tex]K_{1,a} = K_{2,a} + U_{g,2,a}[/tex] (1)
[tex]\frac{1}{2}\cdot M \cdot v_{o}^{2} = \frac{1}{2}\cdot M\cdot v_{1}^{2} + M\cdot g \cdot h[/tex] (1b)
Donde:
[tex]M[/tex] - Masa del acróbata.
[tex]g[/tex] - Constante gravitacional.
[tex]v_{o}[/tex] - Rapidez inicial del acróbata.
[tex]v_{1}[/tex] - Rapidez del acróbata justo antes de recoger al mono.
[tex]h[/tex] - Altura inicial del mono.
Parte II
La suma de las energías iniciales cinética traslacional ([tex]K_{2, a}[/tex]) y potencial gravitacional de acróbata ([tex]U_{g,2,a}[/tex]) y la energía inicial potencial gravitacional del mono ([tex]U_{g,2,m}[/tex]) es igual a la suma de las energías potenciales gravitacionales iniciales del sistema acróbata-mono ([tex]U_{g,3,a+m}[/tex]), es decir:
[tex]K_{2,a} + U_{g,2,a}+U_{g,2,m} = U_{g,3,a+m}[/tex] (2)
[tex]\frac{1}{2}\cdot M\cdot v_{1}^{2} + (M+m)\cdot g \cdot h = (M+m)\cdot g \cdot z[/tex] (2b)
Donde:
[tex]m[/tex] - Masa del mono.
[tex]z[/tex] - Altura máxima del sistema acróbata-mono.
De (1b) tenemos que la rapidez del acróbata justo antes de recoger al mono es:
[tex]\frac{1}{2}\cdot M \cdot v_{o}^{2} = \frac{1}{2}\cdot M\cdot v_{1}^{2} + M\cdot g \cdot h[/tex]
[tex]v_{o}^{2} = v_{1}^{2}+2\cdot g\cdot h[/tex]
[tex]v_{1} = \sqrt{v_{o}^{2}-2\cdot g\cdot h}[/tex]
Finalmente, la altura máxima alcanzada por el sistema acróbata-mono es:
[tex]\frac{1}{2}\cdot M\cdot v_{1}^{2} + (M+m)\cdot g \cdot h = (M+m)\cdot g \cdot z[/tex]
[tex]z = \frac{M\cdot v_{1}^{2}}{2\cdot (M+m)\cdot g}+h[/tex]
[tex]z = \frac{1}{2}\cdot \left(\frac{M}{M+m} \right)\cdot (v_{o}^{2}-2\cdot g\cdot h)+ h[/tex]
[tex]z = \frac{1}{2}\cdot \left(\frac{M}{M+m} \right)\cdot v_{o}^{2}+\left(1-\frac{M\cdot g}{M+m} \right)\cdot h[/tex]
La altura máxima que alcanzan el mono y el acróbata es [tex]z = \frac{1}{2}\cdot \left(\frac{M}{M+m} \right)\cdot v_{o}^{2}+\left(1-\frac{M\cdot g}{M+m} \right)\cdot h[/tex].
If a cat falls off a ledge, the Earth pulls the cat to the ground with the force of gravity. According to Newton's Third Law there must be a reaction force. What is that reaction force?
A. The cat pulls on the Earth
B. The cat’s acceleration is decreased by air resistance
C. The Earth hits the cat
D. The cat falls to the ground
E. The cat hits the Earth
Answer:
The answer Is B.
Explanation:
The cats acceleration is decreased
by air resistance.
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What is the Scientific definition of Consumerism?
Explanation:
Consumerism is a social and economic order that encourages the purchase of goods and services in ever-greater amounts. ... In economics, consumerism refers to economic policies placing emphasis on consumption.
a metal rod has drawing pins stuck to it with wax and is heated at one end...
a)what do you think will happen in this experiment?explain your answer
b)how could this experiment be adapted to compare the codnucting properties of different materials?
Give me two examples of a pushing force and two examples of a pulling force:
Answer:
A pushing force example could be a button, like on a keyboard.
Another example would be a piston.
An example of a pulling force could be a lever.
Another example could be rope.
Hope this helps! c:
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Answer:
the vertical component of the force is 43.30 N.
Explanation:
Given;
angle of inclination of the force, θ = 60⁰
magnitude of the force, F = 50 N
The vertical component of the force is calculated as follows;
[tex]F_y = F \times sin(\theta}\\\\F_y = 50 N \times sin(60)\\\\F_y = 50 N \times \frac{\sqrt{3} }{2} \\\\F_y = 25\sqrt{3} \ N\\\\F_y = 43.30 \ N[/tex]
Therefore, the vertical component of the force is 43.30 N.
Does Sam's story give you any idea for how two taster parents might have a child who is a non-taster
Answer:
if sams answer is yes that they can have a child who is a non-taster then your answer is yes
Explanation:
if both parents are heterozygotes, 25% of their children can be nontaster.
Choose the word that BEST completes the following sentence. Saturn’s rings have been assigned a letter, based on their location. The rings A and B are separated by: Titan The Cassini Division Stars An open space fairly equivalent to the Grand Canyon
Answer:
The correct answer would be Saturn's Cassini Division.
Explanation:
Read about it here.
https://caps.gsfc.nasa.gov/simpson/kingswood/rings/
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The student thinks that two magnets on top of each other will produce a
magnetic field that is stronger than the magnetic field from a single magnet.
The student has a metre rule and more magnets available.
Describe how the student could develop this investigation to test this theory.
Answer:
People have been aware of magnets and magnetism for thousands of years. The earliest records date back to ancient times, particularly in the region of Asia Minor called Magnesia-the name of this region is the source of words like magnet. Magnetic rocks found in Magnesia, which is now part of western Turkey, stimulated interest during ancient times. When humans first discovered magnetic rocks, they likely found that certain parts of these rocks attracted bits of iron or other magnetic rocks more strongly than other parts. These areas are called the poles of a magnet. A magnetic pole is the part of a magnet that exerts the strongest force on other magnets or magnetic material, such as iron. For example, the poles of the bar magnet shown in Figure 20.2 are where the paper clips are concentrated.
Another child is on a swing next to the first. This child has a mass of 48 kg and a maximum kinetic energy of 3800 J. What is the velocity of this child?
Answer:12.583m/s
Explanation:
[tex]KE=\frac{1}{2}mv^{2}[/tex]
[tex]3800=\frac{1}{2}(48)v^{2}[/tex]
[tex]\frac{3800}{24}=v^{2}[/tex]
[tex]\sqrt{158.33} = v\\12.583m/s=v[/tex]
Focus Question: How are physical properties used to compare and classify substances?
Answer:
Properties that can be determined without changing the composition of a substance are referred to as physical properties. Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.
Explanation:
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A 1.3 kg book has 11.7 joules of potential energy relative to the floor when it's sitting on top of
Brenda's dresser. Calculate how tall Brenda's dresser is?
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Think of a movie or tv show where there was a major fight.
What kind of damage was there?
What happened to the ecosystem?
What was it going to take to rebuild?
How is a war a catastrophic event?
Answer:
harry potter
Explanation:
A lot of damage to the Hogwarts school
The ecosystem stayed they same because the school was excluded
It took a bit of magic to rebuild it
A war is a catastrophic event because a lot of people die and get hurt and more people could be drafted and that would hurt the population
A car traveling at 65 mph is an example of its
Answer:
Speed
Explanation:
The distance traveled by an object in a unit of time is speed
what is conservation of energy in physics?
Answer:
https://www.khanacademy.org/science/physics/work-and-energy/work-and-energy-tutorial/a/what-is-conservation-of-energy
Explanation:
Look at this website it gives you all the details! :)
Decribe what must happen inside of an aluminum can in order for it to be attracted to a positively-charged and to a negatively-charged object
Answer:
The PROTONS in the can attract to the negatively charged object, so then the can becomes polarized and the ELECTRONS in the can attract the positively charged object.
Explanation:
The PROTONS inside the can entice to the negatively charged object, so then the can will become polarized and the ELECTRONS in the can appeal to the undoubtedly charged item.
How are proton and electron associated?The number of protons within the nucleus of the atom is identical to the atomic range. The variety of electrons in an impartial atom is identical to the number of protons. The mass range of the atom (M) is equal to the sum of the wide variety of protons and neutrons inside the nucleus.
Protons definitely charged subatomic particles that live in the nucleus. Neutrons: Neutrally charged subatomic particles that are living in the nucleus. Electrons: Negatively charged subatomic debris found inside the electron shells surrounding the nucleus.
An electron is a negatively charged factor of an atom while the proton is an undoubtedly charged frame. The electrons are present out of doors the nucleus inside the orbiting shells. But the protons alongside neutrons shape the nucleus of the atom and are gifted in the middle of the atomic nuclei.
Learn more about electron and proton here: https://brainly.com/question/4894505
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a hot iron bar is placed 100ml 22C water. the water temperature rises to 32C. how much heat did the water gain and how much heat did the iron bar lose? Q=change T x C x M
Answer:
Water gained: 10Iron lost: -10Explanation:
Given: Hot iron bar is placed 100ml 22C water, the water temperature rises to 32C
To find: How much heat the water gain, how much heat did the iron bar lost
Formula:Q = change T x C x M
Solve:
How much heat water gained
Initial heat = 22, then rose to 32. To find how much heat the water gained, simply subtract the current heat by the initial heat.
32 - 22 = 10
The water gained 10 amounts of heat.
How much heat Iron lost
Current heat = 32, then dropped to 22. To find how much heat the Iron lost, simply subtract the initial heat by the current heat.
22 - 32 = -10
The Iron lost -10 amounts of water.
Ten examples of luminous objects
Answer:
Sun, fireflies, glow worms ,Stars ,a lighter torch ,a kerosene Oil Lamp, burning candle, vapor light, a bulb
Answer:
Sun
Flame in an oil lamp
tube light
bulb
fireflies
lighted candle
LEDs
laser
jellyfish
Fire
Explanation:
luminous objects are objects that produce light and are responsible for vision.
According to ohms law, as the voltage increases across a 40 ohm resistor what happens to the current, resistors, and resistance
Answer:
As the voltage increases, the current flowing through the circuit increases while the resistance of the resistor remains constant.
Explanation:
Ohm's law states that the current flowing through a circuit is directly proportional to the applied voltage.
V = IR
where;
I is the current
R is the resistance
V is the applied voltage
Based on this law (Ohm's law), as the voltage increases, the current flowing through the circuit increases while the resistance of the resistor remains constant.
What is sin(77°)? plz help
Answer:
Value of Sin(77 degree) = 0.97437006
Degree / Radian Function
(angle in degree) (angle in radian) Sin Cos Tan Cot Sec Cosec SinH CosH TanH CosecH SecH CotH Arc Sin Arc Cos Arc Tan Arc Cosec Arc Sec Arc Cot
A car travels at uniform velocity at a distance of 100 m in 4 seconds what is the velocity of the car
Answer:
the answer is 25
Explanation:
because the formula for velocity is distance divided by time.
1. Heat energy is also known as
energy.
?
Heat energy is also called thermal energy.
Who do you think had the most influence on modern science: Descartes or Newton? And why? i'll give brainliest
Answer: Newton
Explanation:
Isaac Newton is viewed as one of history's most persuasive researchers. During his lifetime, Newton created the hypothesis of gravity, the laws of movement (which turned into the establishment of material science), another strategy for arithmetic known as analytics, and leap forwards in optics like the reflecting telescope.
tic energy
15.The energy changes that take place when a stone falls freely from rest to
the ground can be orderly arranged as
A. Kinetic energy → Potential energy
B. Sound energy → Potential energy
C. Potential energy
→ Sound energy
D. Potential energy
16.A ductile material is that which
→ Sound energy
→ Heat.
→ Kinetic energy → Heat.
→ Kinetic energy → Heat.
→ Kinetic energy → Heat energy
→ Sound.
Answer:
15. potential- kinetic -potential
16. I don't understand
Ductile materials are materials that can be drawn into wire e.g copper
Answer:
15.A
Explanation:
a falling objects posses kinetic energy whiles objects at rest has potential energy
If a chemical reaction has a AH value of -125 kJ, it would be considered what?
Answer:
Exothermic Reaction
Explanation:
ENDOTHERMIC REACTION: A chemical reaction is considered endothermic if the energy is absorbed during the reaction. In other words, if the energy is required by the reactants to proceed with the reaction, then the reaction is endothermic.
The value of enthalpy change ΔH is positive in such reactions showing intake of energy.
EXOTHERMIC REACTION: A chemical reaction is considered exothermic if the energy is released during the reaction. In other words, if the energy is produced as a product of the reaction, then the reaction is exothermic.
The value of enthalpy change ΔH is negative in such reactions showing the release of energy.
Since, the value of ΔH = -125 KJ, is negative for the given reaction.
Therefore, it would be considered as Exothermic Reaction.
PLZZ IF ANYONE KNOWS SCIENCE HELP ME PLZ I this is so confusing :(
ill liderally make a question with 50 and a brainliest since you helped me ;-;
Answer:
i think it would be either b or c because....
Explanation:
"The desert biome is best adapted for aloe because aloe plant usuallly grows in open area under sunlight exposure where the intensity of sunlight is very high. Its grows in very rocky, dry and open areas."
Ayala is making salad dressing. She mixes oil and vinegar in a blender until a smooth consistency is formed. Explain whether this is a heterogeneous or a homogeneous mixture and why
Answer:Hetero
Explanation: Honestly, same as the last guy said
Choose all that apply about the earths crust
1. thickest layer
2. thinnest layer
3. densest layer
4. least dense layer
5. home to all life
6. home to most life
6. made of hot soft rock
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A truck skids for a distance of 25m with the road pushing on its tires with force of 1500N as its brakes are applied. What is the change in kinetic energy for the truck?
Answer:
37500 J
Explanation:
Law of conservation of energy: Its states that energy can neither be created nor destroyed but it can be transformed from one form to another.
Applying the law of conservation of energy.
The change in kinetic energy for the truck = Net work done by the truck skids
ΔK.E = F×d.................... Equation 1
Where ΔK.E = Change in kinetic energy, F = Force, d = distant.
Given: F = 1500 N, d = 25 m
Substitute these values into equation 1
ΔK.E = 1500×25
ΔK.E = 37500 J
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