Question

Q1. A cricket ball of mass 200g moving ata speed of 20m/s is broughtto rest by aplayer in 2 secs.Findthe average force applied by theplayer. Q. 2. When a bar of iron 100cm long at 20 o c is heated in the furnace, it becomes 110cm. If the coefficient of linear is expansion of iron 11X10 -6 per 0c,find the temperature of the furnace. Q.3 The temperature of two bodies differ by 20 o c. How much will they differ on fahrenheit scale? Q.4. How is the time period of a simple pendulum effected, if at all when the mass of bob is increase four times, Q.5. Express 35 o c in Kelvin. Q.6. Convert 15 o f on Celsius scale.

Answer 1

the rate of change of momentum is equal to force acted on body so answer will be 2newtons