Question

Q-1 A bullet is moving at the late of 250 m/s, is fired in to a log of wood. The bullet penetrates
to a depth of 40cm. If the bulet Roving with the same velocity is fired in to a similar piece of
wood 20 cm thick, with what velocity would it emerge? Take the resistance to be uniform in both
the cases.​

Answer 1

The tree limb exerts a force on the bullet in thedirection opposite to its velocity. This force causes deceleration and hence the velocity decreases from 250 m/s to zero in 5 cm. We have to find the force exerted by the tree limb on the bullet. If a be the deceleration of the bullet, we have <br>

a=((250 m/s)^2=0^2)/(2xx0.05m)=625000m/s^2

F=ma=6250 N.

Answer 2

Answer:

78125m/s2

is the ans

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