Q1. A ball is dropped from rest at a height of 80 m above the ground.
a. What is its speed as it hits the ground?
b. How long does it take for it to reach the ground?
Q2. A 3.10-m-long, 310 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 73.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque about the point where the beam is bolted into place?