1. A 40-kg trunk sliding across a floor slows down from 5.0 to 2.0 mls in 6.0 s. Assuming that the force acting on the trunk is constant, find its magnitude and its direction relative to the velocity vector of the trunk.

2. A resultant force of 20 N gives a body of mass m an acceleration of 8.0 m/s2, and a body of mass m I an acceleration of 24 m/s2 • What acceleration will this force cause the two masses to acquire if fastened together?

3. A 20-kg crate hangs at the end of a long rope. Find its acceleration when the tension in the rope is (a) 250N, (b) 150 N, (c) zero, (d) 196N.