4. Calculate the value of acceleration due to gravity on the surface of moon. Mass of the moon = 7.4 ×10²² and radius of moon = 1.75 × 10⁶        G = 6.67 × 10^–11 (2)

6. An athlete completes one round of circular track of diameter 200 m in 40 sec. What is will be the distance covered and the displacement at of 2 min 20 sec. (4)