Calculate the potential energy acquired by an object of mass 3.0 kg when it is lifted through a vertical distance of 1.4 m. A car of mass 1200 kg starts from rest and reaches a speed of 20 m/s after...

Calculate the potential energy acquired by an object of mass 3.0 kg when it is lifted through a vertical distance of 1.4 m.

A car of mass 1200 kg starts from rest and reaches a speed of 20 m/s after travelling 250 m along a straight road. If the driving force is constant, what is its value?