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Ball 1 is thrown to the ground. Ball 2 is dropped to the ground from rest. Assuming the balls have the same mass and are released from the same height. Is the change in gravitational potential energy of ball 1 grater than, less than or equal to the change in gravitational energy of ball 2. Compare their velocities at the time they hit the ground.

Is the work done by the gravitational force on the skier as the skier slides from point AA to point BB positive or negative? Justify your answer.

The car C and its contents have a weight of 500 lb, whereas block B has a weight of 240 lb. The car is released from rest. (Figure 1) Figure приватний PIS 20° 30 ft 1 of 1 Part A Determine the car's speed when it travels 30 ft down the 20° incline. Suggestion: To measure the gravitational potential energy, establish separate datums at the initial elevations of B and C. Express your answer to three significant figures and include the appropriate units. V = μA Value Submit Request Answer Units < Return to Assignment Provide Feedback ?

A student lifts a 1.26-kg book from her desk to a bookshelf. If the gravitational potential energy of the Book-Earth system increases by 9.10 J, how high is the bookshelf above the desk?

A person drops a ball from the roof of a building while a second person observes themotion of the ball from the ground. Will the people agree on the value of the gravitational potentialenergy? The change in potential energy? The kinetic energy? Explain your answers in detail please

Problem 3:   A hiker of mass 57 kg is going to climb to the top of Mount Tam, which has an elevation of 2,574 ft. Part (a)  If the hiker starts climbing at an elevation of 495 ft, what will their change in gravitational potential energy be, in joules, once they reach the top? Assume the zero of gravitational potential energy is at sea level.  ΔVg = ______ Part (b)  Repeat the above calculation for the change in gravitational potential energy, but assume the gravitational potential is zero at the top of the mountain.  ΔVg = ______

A planet with a radius of 6.00 × 107 m has a gravitational field of magnitude 41.7 m/s2 at the surface. What is the escape speed from the planet?

Assume that a man lifts 800 kg, the mass of half of the car, and a height of 0.5 m.  What is the gravitational potential energy supplied by Wonder Woman when lifting the back of the car? PE= mgh= (800kg)(9.81m/s2)(0.5m)= 3,924 J Calculate the power he exerts when lifting the car over a time interval of 5 seconds.  (I just need help with the second half)

A 3.0 kg block is thrown downward from a point 37 m above the Earth's surface. At what height above Earth's surface will the gravitational potential energy of the Earth-block system have decreased by 320 J? O 11m O 37 m O 7.0 m O 26 m O 48 m Save for Later Submit Answer