A shot travelling at the rate of `100 ms^(-1)` is just able to pierce a plank 4 cm thick. What velocity is required to just pierce a plank 9 cm thick ?

A shot travelling at the rate of 100m//s is just able to pierce a plant 4 cm thick. What velocity is required to just pierce a plank 9cm thick ?

A bullet of mass 100gm moving with a velocity of 100ms^(-1) just pierces through a plank of 100cm thick.If it is 50cm thick it emerges with a velocity

A bullet moving with a speed of 100 ms^(-1) can just penetrate into two planks of equal thickness. Then the number of such planks, if speed is doubled will be .

A bullet travelling horizontally looses 1//20^(th) of its velocity while piercing a wooden plank. Then the number of such planks required to stop the bullet is

A bullet moving with a speed of 120 m/s is able to penetrate through 5 cm into a thick wooden board. Calculate the required velocity of bullet to penetrate through 8 cm in the same wooden board .

A bullet moving with a speed of 100 m/s can just penetrate two planks of equal thickness. Now if speed is doubled, then number of such planks required to stop the bullet will be

. A bullet moving with a velocity of 200 cm / s penetrates a wooden block and comes to rest after traversing 4 cm inside it. What velocity is needed for travelling distance of 9cm in same block

A bullet when fixed at a target with a velocity of 100 ms^(-1) , penetrates one metre into it. If the bullet is fired with the same velocity as a similar target with a thickness 0.5 metre, then it will emerge from it with a velocity of

A bullet leaving the muzzle of a rifle barrel with a velocity v penetrates a plank and loses one-fifth of its velocity. It then strikes second plank, which it just penetrates through. Find the ratio of the thickness of the planks, supposing the average resistance to the penetration is same in both the cases.

A bullet loses 1//2th1 of its velocity is passing through a plank. What is the least number of planks required to stop the bullet ?