a 0.67 kg rubber ball has a speed of 2.2 m/s at point a and kinetic energy 7.1 J at point B find the total work done on the ball as it moves from a to b

Answer 1

Ek1 =0.5*0.67*(2.2)^2=1.62 J. @ point a.

Ek2 = 7.1 J. @ point b.

Work = The change in kinetic energy.
Work = Ek2 - Ek1 = 7.1 - 1.62 = 5.48 J.