What are Some of the Most Common Energy Sources?

How much force is needed to slow down a 15 kg car traveling at 60 m/s to 15 m/s in 10 seconds?

After a large snowstorm you shovel 2000 kilograms of snow off your side walk in 1 hour. you lift the shovel to an average height of 1.25 meters while you are piling the snow in your yard. how much work did you do?

How much work must be done to accelerate an 8.5*10^5 kg train from a) 10m/s to 15m/s b) 15m/s to 20m/s and c) to an Initial stop of 20m/s

A cart rolling down an incline for 2.0 seconds has a beginning speed of 3.0m/s, what Is the final speed or volocity?

What chemical weathering called oxidation causes

In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.830). It has a temperature of 64.1 oC.

Air is compressed adiabatically in a piston-cylinder assembly from 1 bar, 300 K to 10 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible.

Three rocks, each of varying mass and volume, are released from a window at the same time. The window is at height h above the ground.

The gravitational force extend by a large, object, such as Earth is

What besides mass and gravity, what other factor affects gravitational potential energy?