Which word expression describes how to calculate pressure?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

Rohit is trying to tune an instrument