114.a ball of mass 1 kg is dropped from a height of 9.8m strike aground and rebounds to a height 4.9m if time of contact between ball and ground 0.1s then find impulse avg. force acting on a ball

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Q. A ball of mass

1 k g

dropped from

9.8 m

height strikes the ground and rebounds to a height of

4.9 m

. If the time of contact between ball and ground is

0.1 s

, then find impulse and average force acting on ball.

Q. A ball of mass

= 100

gm is released from a height

h_{1} = 2.5 m

from the ground level and then rebounds to a height

h_{2} = 0.625 m

The time of contact of the ball and the ground is

Δ t = 0.01

sec. The impulsive (impact) force offered by the ball on the ground is

Q. A ball of mass

0.15 Kg

is dropped from a height

10 m

, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is nearly:

(g = 10 {m/s}^{2})

A rubber ball of mass 50 g falls from a height of 5 m and rebounds to a height of 1.25 m. Find the impulse and the average force between the ball and the ground if the time for which they are in contact .

Q. E-4 A steel ball of mass 0.5 Kg is dropped from a height of 4 m on to a horizontal heavy steel slab.The ball strike the slab and rebounds to its original height

(t a k e g = 10 m / s e c^{2})

(a) calculate the impulse delivered to the ball during impact.
(b) if the ball is in contact with the slab for 0.002s,find the average reaction force on the ball during impact.

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