Home
Class 11
PHYSICS
A bullet of mass 20g enters into a fixed...

A bullet of mass `20g` enters into a fixed wooden block with a speed of `40 ms^(-1)` and stops in it .Find the change in internal energy during the process

Text Solution

Verified by Experts

The correct Answer is:
A
Since the bullet enters and stops insides the block , the total K.E.change by the bolled is responsible for the internal changes of the block
Change in internal energy
K.E. of bollet
`= (1)/(2) xx (20)/(1000) xx 40 xx 40 = 16J`
Promotional Banner

Similar Questions

Explore conceptually related problems

A railway coach of mass 8000 kg moving with speed of 54 ms^(-1) collide with rest coach of same like . Find the decrease in kinetic energy in this process.

A system goes from A and B via two processes. I and II as shown in figure. If DeltaU_1 and DeltaU_2 are the changes in internal energies in the processes I and II respectively, then

A hammer of mass 500g strikes an iron nail with speed of 50 m/s. If the nail stops , the hammer in a short duration of 0.01s , then find the force acting on the nail by the hammer .

A hammer of mass 500g strikes an iron nail with speed of 50 m/s. If the nail stops , the hammer in a short duration of 0.01s , then find the force acting on the nail by the hammer .

A body of mass 10kg performs motion along a circle of radius 5m with speed of 10ms^(-1) . Work done during one revolution is ………….J.

A bullet of mass 0.04 kg moving with a speed of 90 m s^(-1) enters a heavy wooden block and is stopped after a distance of 60 cm. What is the average resistive force exerted by the block on the bullet?

A cricket ball of mass 150 g is moving with a speed of 12ms^(-1) and is hit by a bat so that the ball is turned back with velocity of 20ms^(-1) if duration of contact between bat and ball is 0.01 s then: