2 A cam, rotating at 300 rpm, imparts simple harmonic motion to a 1.8 kg follower with a 160 mm travel. Attempt EACH of the following: a Explain the terms cam and follower with a simple sketch and explain how such a (4)system generates simple harmonic motion; b Calculate the translational kinetic energy of the follower when it is 30 mm from the end of its upward travel.