Pls answer the seventh question lies a etgnt or 10 gwt., what is the correction that needs to be appli
to the reading of the erronous spring balance?
6. The length of minute hand of a clock is 14 cm. calculate the speed with which the tip of the minute hand
moves.
7. (a) Define the term inertia. Name the quantity that measures it. (b) Which physical quantity corresponds
to rate of change of momentum? Two objects A and B of same masses and velocities v and 3v
respectively are in motion. Which object of larger momentum?
8. Give reason to support your answers. An auto driver moving with a speed of 36 km/h sees a child standing i
the middle of the road. He applies break and brings his vehicle to rest in 5 seconds just in time to save the
child. If the total mass of the auto and the driver be 450 kg then calculate the force of brake
9. A stone is dropped from a height of 10 m on an unknown planet having g = 20 m/s2.
Calculate the speed of the stone when it hits the surface of the planet. Also calculate the
time it takes to fall through this height
