What is the potential energy (compared to the floor) of a 1200N box which is 4.0 m above the floor?

A roller coaster car of mass 255 kg rolls up a hill with a vertical height of 45 m from the ground. What is the change in potential energy relative to the ground?

A 0.25 kg ball is suspended from a light 1.5 m string as shown. The string makes an angle of 31° with the vertical. Let U = 0 when the ball is at its lowest point (θ = 0). a) What is the gravitational potential energy, in joules, of the ball before it is released?  b) What will be the speed of the ball, in meters per second, when it reaches the bottom?

A 150g book is initially at rest on a table that has no friction. A force of 3.2 N is applied to the book which moves over a distance of 1.2 m. The table is 1.4m high. What is the gravitational potential energy of the book relative to the table?

Someone drops a 70 – g pebble off of a docked cruise ship, 50.0 m from the water line. A person on a dock 5.0 m from the water line holds out a net to catch the pebble. (a) How much work is done on the pebble by gravity during the drop? (b) What is the change in the gravitational potential energy during the drop? If the gravitational potential energy is zero at the water line, what is the gravitational potential energy (c) when the pebble is dropped? (d) When it reaches the net? What if the gravitational potential energy was 40.0 Joules at water level? (e) Find the answers to the same questions in (c) and (d). |

A 99.2 kg object rises by 35.8 m.  How much potential energy (in joules) has this object gained?

What is the potential energy of a 3.10kg object at the bottom of a well 12.8 m deep as measured from ground level ?

You fly from Boston’s Logan Airport, at sea level, to Denver, altitude 1.6 km. Taking your mass as 65 kg and the zero of potential energy at Boston, what’s your gravitational potential energy (a) at the plane’s 11-km cruising altitude and (b) in Denver? I’ve completed the question and want to compare to see if it’s correct

A 28 kg object is located 2 meters above the ground. Calculate the object's gravitational potential energy (in Joules) relative to the ground. Your Answer:

Problem 6: A 0.25 kg ball is suspended from a light 1.2 m string as shown. The string makes an angle of 35° with the vertical. Let U=0 when the ball is at its lowest point (0 = 0). What is the gravitational potential energy, in joules, of the ball before it is released? What will be the speed of the ball, in meters per second, when it reaches the bottom? (from Problem 9) Does replacing the ball by a steel sphere of mass 0.75 kg at the end increase the maximum speed? L Otheexpertta.com