1. A 1.4 x 103kg car is westbound at a velocity of 37.0 km/h when it collides with a 2.0 x 10kg truck northbound at a velocity of 35 km/h. If these two vehicles lock
together upon collision, what is the initial velocity of the vehicles after collision?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.