02 – Mechanics

2020-mcq-4

The figure shows the velocity (v) – time (t) graph for an object moving along a straight line. What is the average velocity of the object from t = 0 to t = 4 s?
(1) 1.5 ms-1 (2) 2.0 ms-1 (3) 2.5 ms-1 (4) 2.7 ms-1 (5) 3.3 ms-1

v – t

Answer is (3)

2020-mcq-5

The figure shows a thin uniform rod AB of length L and M. Moment of inertia of the rod about axis PQ parallel to the rod, situated at a distance y is,