Home
Class 11
PHYSICS
A bullet going with speed 350 m/s enters...

A bullet going with speed 350 m/s enters concrete wall and penetrates a distance of 5.0 cm before coming to rest. Find the deceleration.

Text Solution

Verified by Experts

The correct Answer is:
A, B
`u= 350 m/s
S=5cm=0.05m
v=0
Decelaratiion
a= (v^2-u^2)/(2s)
=(0-(350)^2)/(2xx0.05)
=-12.2xx10^5m/s^2
Deceleration is 12.2xx10^5m/s^2`
Promotional Banner

Similar Questions

Explore conceptually related problems

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 0.5 kg ball moving with a speed of 12 m//s strikes a hard wall at an angle of 30^(@) with the wall. It is reflected with the same speed and at the same angle . If the ball is in contact with the wall for 0.25 s , the average force acting on the wall is

A hammer of mass 1 kg moving with speed of 6 ms^(-1) strikes a wall and comes to rest in 0.1 s . Calculate (i) the impules of force (ii) the retardation of the hammer , and (iii) the retarding that stops the hammer .

A fan is rotating with a speed of 450 rec/minute. Afer being switched off it comes to rest in 10s. Assuming constant angular deceleration, calculate the number of recvolutions made by it before coming to rest.

A car weighing 1000 kg is travelling at the speed of 15ms^(-1) . It decelerated due to brakes applied and stops after covering a distance of 25 m. Find the force exerted by the brakes and the work done by the brakes.

After striking a floor a certain ball rebounds ((4)/(5))^(th) of the height from which it has fallen. Find the total distance that it travels before coming to rest, if it is gently dropped from a height of 120 meters

A ladder is placed against a wall such that its foot is at a distance of 2.5 cm from the wall and its top reaches a window 6 m above the ground. Find the length of the ladder.