A ball traveling from point A to point B on the surface of the Earth follows the trajectory shown in the figure. C B. D What is the speed at point C compared with that at point A? It is greater at C than at A It is less at C than at A The speeds are both zero

A student stands at the top of a building of height 50 m. He throws two identical balls with a speed of 20m/s, one up, the other down. If air resistance is included which ball strikes the ground with higher speed? A. The ball thrown upward B. The ball thrown downward C. Both balls will have the Same speed

See photo x = 36.0 m, y = 38.2 m, z = 43.2 m a. Assuming the track is frictionless, what is the minimum speed required at Point A for the roller-coaster to reach Point B? b. If the roller-coaster starts at Point A with this speed, how fast will it be going when it reaches Point B? c. What will be the maximum speed of the roller-coaster during this part of its trip?

A 500 kg cart rests atop a hill 30.0 m high on a roller coaster. Its gravitational potential energy is measured relative to the bottom of the hill. The cart then rolls down the hill. Which of these best describes what is happening in this situation?   a. the total mechanical energy of the cart is decreasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is increasing   b. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is increasing   c. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is decreasing   d. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is decreasing, and the gravitational potential energy of the cart is increasing   e. the total mechanical energy of…

QUESTION 3 Object A (5 kg) is a certain height above the ground. Object B (5 Kg) is twice as high as Object A. Therefore we can say that Object B has _________  gravitational potential energy as Object A.   a. twice as much   b. half as much   c. four times as much.   d. three times as much.

45.) Which of the following would describe gravitational potential energy? a. a book sitting on a shelf b. a rubber band stretched in an upward direction c. an apple sitting on the counter

Four identical masses of 7.3 grams are placed at the corners of a square with a side length of d = 27 cm, as shown below. What is the gravitational potential energy of the system? d d

1. Calculate the work done on the suitcase by  F→. Express your answer with the appropriate units. 2. Calculate the work done on the suitcase by the gravitational force. Express your answer with the appropriate units. 3.Calculate the work done on the suitcase by the normal force. Express your answer with the appropriate units. 4. Calculate the work done on the suitcase by the friction force. Express your answer with the appropriate units. 5. Calculate the total work done on the suitcase. Express your answer with the appropriate units. 6. If the speed of the suitcase is zero at the bottom of the ramp, what is its speed after it has traveled 3.90 mm along the ramp? Express your answer with the appropriate units.

The figure shows four particles, each of mass 17.5 g, that form a square with an edge length of d = 0.600 m. If d is reduced to 0.150 m, what is the change in the gravitational potential energy of the four-particle system? d d

At its maximum speed, a 4 kg sloth can climb a height of 6 m in 2 minutes. A. What is the primary energy transformation that is taking place? B. What is the force required for the sloth to climb at a constant speed? C. How much work does this sloth do climbing the tree? D. How much does the potential energy increase?