75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground). What is the potential energy of the refrigerator?

The lowest point in Death Valley is 85 m m below sea level. The summit of nearby Mt. Whitney has an elevation of 4420 m m above sea level. What is the change in potential energy of an energetic 68 kg k g hiker who makes it from the floor of Death Valley to the top of Mt. Whitney?

A 5.00-kg object is moved from a height of 3.00 m above a floor to a height of 7.00 m above the floor.  What is the change in gravitational potential energy?

The top of a descending ski slope is 50 m higher than the bottom of the slope. A 60-kg skier starts from rest and skis straight to the bottom of the slope. If 20% of the gravitational potential energy change of the skier  is converted into internal energy (due to friction and air drag), how fast is the 60-kg skier traveling at the bottom of the slope? Again, represent the process with work-energy bar charts indicating the system, the initial state, and the final state.

A 900 N crate slides 12 m down a ramp that makes an angle of 35° with the horizontal. If the crate slides at a constant speed, how much thermal energy is created?

How much potential energy does a person of mass 92 kg have if they are standing at the top of a building that is 56.2 m high? Submit your answer in exponential form.

How much potential energy does a person of mass 54 kg have if they are standing at the top of a building that is 60.3 m high? Submit your answer in exponential form.

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

your fish tank has a mass of 80 kg when full. If it sits on a 1.5 meter stand, whats its gravitational potential energy

A cable car with a mass of 5200-kg in Los Angeles (CA) is pulled a distance of 360 m along a cable up a hill inclined at 12° from the horizontal. The change in the potential energy of the car is 3.8 x10^6 3.9 x10^5 1.8 x10^7 O2.3 x10^7