The diagram below shows a large crane working in a scrap yard. The device
hanging from the crane is a(n)

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.