Home
Class 11
PHYSICS
A 5.0g bullet moving at 100m//s strikes ...

A `5.0g` bullet moving at `100m//s` strikes a log. Assume that the bullet undergoes uniform deceleration and stops in `6.0cm`. Find (a) the time taken for the bullet to stop, (b) the impulse on the log and (c) the average force experienced by the log.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
(a) `v^2=u^2-2as`
`:. a=(u^2)/(2s)` `(v=0)`
`=((100)^2)/(2xx0.06)=8.3xx10^4m//s^2`
`v=u-at`
`0=u-at`
or `t=u/a=(100)/(8.3xx10^4)`
`=1.2xx10^-3s`
(b) `Impu lse=|Deltap|=mv_i`
`=(5xx10^-3)(100)`
`=0.5N-s`
(c) `Impu lse=(F_(av))t`
`:. F_(av)=(Impu lse)/(t)`
`=(0.5)/(1.2xx10^-3)`
`=417N`
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS, LINEAR MOMENTUM AND COLLISION

    DC PANDEY|Exercise Exercise 11.6|11 Videos

  • CENTRE OF MASS, LINEAR MOMENTUM AND COLLISION

    DC PANDEY|Exercise Level 1 Assertion and Reason|15 Videos

  • CENTRE OF MASS, LINEAR MOMENTUM AND COLLISION

    DC PANDEY|Exercise Exercise 11.4|4 Videos

  • CENTRE OF MASS, IMPULSE AND MOMENTUM

    DC PANDEY|Exercise Comprehension type questions|15 Videos

  • CIRCULAR MOTION

    DC PANDEY|Exercise Medical entrances s gallery|19 Videos

Similar Questions

Explore conceptually related problems

A 20 gram bullet moving at 300m//s stops after penetrating 3cm of bone. Calculate the average force exerted by the bullet .

A bullet moving at 20m/sec. It strikes a wooden plank and penetrates 4 cm before coming to stop. The time taken to stop is

A bullet is fired from a rifle that is held 1.6 m above the ground in a horizontal position. The initial speed of the bullet is 1100 m/s. Find the time it takes for the bullet to strike the ground and the horizontal distance traveled by the bullet.

A 10.0-g bullet traveling horizontally at 755 m/s strikes a stationary target and stops after penetrating 14.5 cm into the target. What is the average force of the target on the bullet ?

A 10 g bullet moving at 200 m/s stops after penetrating 5 cm of wooden plank. The average force exerted by the bullet will be

A 10 g bullet moving at 200 m/s stops after penetrating 5 cm of wooden plank. The average force exerted on the bullet will be

A bullet of mass 50g moving with a speed of 500 ms^(-1) is brought to rest in 0.01s Find the impulse and the average force .

A machine gun fires 50 g bullets at the rate of 4 bullets per second. The bullets leave the gun at a speed of 1000 m/s. What is the average recoil force experienced by the machine gun?