The distance from the bottom of the objective lens to the surface of the slide is called the

Can someone explain to me how to do this problem ?

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.