Question

. A child suspends a steel disc in a vertical plane by means of a thread. Then he shoots bullets on the
disc by a toy-gun. If the mass of each bullet be 2.0 g and the bullet striking the disc with a velocity of
11 m/s is returning with the same velocity, then what average force is being exerted on the dise? The
child is firing 3 bullets per second.
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Answer 1

Answer:

0.132N

Explanation:

Initial velocity of the bullet, u = 11 m/s

Final velocity of the bullet, v = -11 m/s

mass ot the bullet ,m = 2 g

mass of the bullet per  sec, m'

=2*3/1000=0.006Kg

t = 1sec

average force exerted on the disc = ( m'v - m'u )/t

F=(-11*0.006-11*0.006)/1

=0.132N

Answer 2

Answer:

0.132N

is the answer.

Explanation:

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