Potential energy = (mass) x (gravity) x (height).
Even if the two objects are at the same height, the one
with more mass has more potential energy.
Answer:
There is a force that has the same magnitude as that of the hammer applied on the astronaut and with direction away from the asteroid, movement is given by
F_hammer - F_Gravitation = m a
Explanation:
For this exercise we will propose its solution from Newton's third law, which states that every action has a reaction of equal magnitude, but felt different.
As it is in space, we must assume that it is not subject to the gravitational attraction of nearby bodies, except the asteroid that attracts it. When he extends his hand and hits the asteroid, he exerts a force on him, by Newton's third law he responds with a force of equal magnitude applied to the astronaut, therefore without the two they are not united they could separate if this force is greater than the force of universal attraction between the two.
In summary There is a force that has the same magnitude as that of the hammer applied on the astronaut and with direction away from the asteroid, movement is given by
F_hammer - F_Gravitation = m a
Answer:
-100000 N.
Explanation:
Force: This can be defined as the product of the mass of a body and it's acceleration. The S.I unit of Force is Newton(N). The Formula of force is given as,
F = ma ........................... Equation 1
Where F = Average force exerted on the car, m = mass of the car, acceleration of the car, a = acceleration of the car.
a = (v-u)/t..................... Equation 2
Where v = Final velocity, u = Initial velocity, t = time.
Substitute equation 2 into equation 1
F = m(v-u)/t............. Equation 3
Given: m = 1500 kg, u = 20 m/s, v = 0 m/s (brought to rest), t = 0.3 s.
Substitute into equation 3
F = 1500(0-20)/0.3
F = 1500(-20)/0.3
F = -100000 N.
Note: The negative sign is due to the fact that the force exerted on the car by the pole is equal and opposite the force of the car.
Thermal energy is temperature. But indirectly if you raise pressure by adding particles themperature will increase. And increase in t will increase thermal energy
Answer: D) A and B (Doppler shift equation and Kepler's 3rd Law)
Explanation:
According to Kepler’s 3rd Law of Planetary motion <em>“The square of the orbital period of a planet is proportional to the cube of the semi-major axis (size) of its orbit”. </em>
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So, this law establishes a relation between the orbital period of a body orbiting a greater body in space with the size of its orbit. <u>This leads to the fact that a small body can be caught by the gravitational attraction of a massive body and the time it takes to the smaller body to orbit the massive body is proportional to the size of its orbit.</u>
On the other hand, the Doppler shift equation is related to the Doppler effect and refers to the change in a wave perceived frequency (or wavelength=color) when the emitter of the waves, and the observer move relative to each other. From there, it is deduced that the farther the galaxy is, the more redshifted it is in its spectrum proving the expansion of the universe.
Now, this equation can be applied in order to analyze the velocity of the stars within a galaxy (as Vera Rubin did), and then galaxy rotation curves can be obtained. However, in this type of diagram it is observed a characteristic behavior in the rotation speed of the stars within the galaxies, which differs from the rules of the orbital movement postulated by Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars is "constant", regardless of the distance to the center of the galaxy. This discrepancy is used to detect the existence of dark matter in galaxies and the universe.
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