Question

1. A 430 gram soccer ball is moving sideways at 11 m/s toward a player. The player kicks the ball. After being in contact with the player’s foot for 0.014 seconds, the ball moves horizontally away from the kicker at a speed of 23 m/s. Calculate the average force on the ball during the collision.

2. Blocks m​1​ = 12 kg and m​2​ = 7 kg are attached by a rope over an ideal pulley as shown. There is a 25 Newton friction force acting against the motion of the 12 kg block as it slides across the table. Set up force diagrams for each block separately and use them to help you answer the following:

(a) Find the acceleration of the 12 kg block along the table. (b) Calculate the tension in the rope.

(b) Calculate the tension in the rope.

Answer 1