Rosalie is doing some gardening, She pushes her 30kg wheelbarrow up a hill at 4 meters per second squared with a force of 120N. What is the mass of the cart?

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?