You throw a ball off the top of a building at an angle of 30.0° above the horizontal. You release the ball from a point 19.6 m above the ground. If it takes 4.00 s for the ball to hit the ground, how far did it travel horizontally?

Work = force × a. work b. energy c. distance d. momentum

Rohit is trying to tune an instrument

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.