Which two options are forms of potential energy A nuclear energy
B chemical energy
C sound energy
D thermal energy
E electrical energy

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain