A25-kg child sits at the top of a 4-meter slide. after sliding down, the child is traveling at 5 m/s. how much pe does he start with? how much ke does he end with? how much energy is lost to friction?

if you push a box across the floor with a force of 30 n you push it 15 meters in 8 seconds how much work will you do how much power did you use?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

Why is a noble gas different from other elements?

Suppose that a cylindrical tank 6 meters high with a radius of 2 meters is filled to the rim with water. the tank is buried so that the top of the tank is 1 meter below ground level. the space above the tank is not filled with water. calculate how much work needs to be done by a pump to pump the water out of the tank up to ground level. (the water weighs 9,800 newtons per cubic meter.)