Question

A cube of mass M starts at rest from point 1 at a height 4R, where R is the radius of the circular track. The cube slides down the frictionless track and around the loop. Find the force which the track exerts on the cube at point 2.

(a) The bob of a pendulum is released from a horizontal position. If the length of the pendulum is L, what is the speed with which it arrives at the lower most point, given that it dissipates its 10 % energy against air resistance? (b) If the same bob is releases as shown in the figure, find the speed at the lowermost point if it dissipates no energy.

(a) What are the differences between the centre of gravity and the centre of mass? (b) A square plate of mass 120 g and edge 5.0 cm rotates about one of edges. If it has a uniform angular acceleration of 0.2rad/s², what torque acts on the plate?

Complete the following by choosing the correct answers from the bracket: