At the time t1 = 0, an object with a mass m = 8.01 kg passes through the origin with a velocity v1 m/s. At a time t2 = 2.00 s, the object is at the position r m. Assume that the force acting on the object during the time interval Δt = t2 − t1 is constant and determine the following.

(a) the kinetic energy of the object at the time t
(b) the force acting on the object during the time interval Δt = t2 − t1