Question

Draw an illustration of the problems including the given & required data. Show the complete solution in legible handwriting.

1. A 64.80 g ball was fired into a 185.00 g ballistic pendulum hanging 7.10 cm from the base of the ballistic device. The ball was trapped in the pendulum bob, and the impact caused the pendulum to swing to a height of 13.70 cm from the base. Calculate the a) velocity of the ball and pendulum after impact b) initial velocity of the ball before impact c) the total momentum of the ball and pendulum before impact d) the total momentum of the ball and pendulum after impact   e) What type of collision is shown in the problem?

2. A 1.50 kg carpenter's tool fell from the roof of a building 12.0 m high. Show that the total mechanical energy (sum of PE and KE) a) before falling b) 1.5 s after it has fallen and c) when it reach the ground are equal.

3. A 0.280 kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in opposite direction with a speed of 22.0 m/s. a) What impulse is delivered to the ball by the player? b) If the player's fist is in contact with the ball for 0.0600 s, find the magnitude of the average force exerted on the player's fist. (Remember that change in momentum = impulse and velocity is a vector quantity)

4. A 2.0 kg body is tied at the end of a string and whirled in a horizontal circle of radius 1.2 m at 3 revolutions per second. Determine the a) speed b) acceleration c) pull of the string on the body d) pull of the body on the string

5. A weight lifter lifts a 350 N set of weights from ground level to a position over his head , a vertical distance of 2.00 m. How much work does the weight lifter do , assuming he moves the weights at constant speed?

Answer 1