Q. A rock is thrown vertically upward from ground level at time t = 0. At t = 1.76 s it passes the top of a tall tower, and 1.23 s later it reaches its maximum height. What is the height of the tower?
Q. A 1.0 kg stone is being whirles at constant speed of 12 m/s in a circle, held on a frictionless surface by a steel wire which is horizontal. The wire is 4.0 m long and its radius is 1.0 mm. Find the strain in the wire.