Question

A shell is weighing 800kg is fired horizontally with avelocityvof 500 m/sec. From a gun weighing 50 tonne. with what initial velocity, the gun will recoil? what average force will be required to bring it to rest if it is allowed to move through one meter​

Answer 1

Explanation:

(a) By momentum conservation 

700×5=v×35×103v=103100=0.1m/s 

(b) K.E. goes into work done by friction 

21(35×103)v2=f×x21×35×103×0.01=0.175m 

Answer 2

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Question From class 11 Chapter CENTRE OF MASS

A shell of mass 100 kg is fired horizontally from a cannon with a mass of

. The kinetic energy of the shell at the end of the barrel is

. The kinetic energy imparted to the cannon by the recoil is

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Text Solution

Answer :

C

Solution :

m=100 kg <br>

<br> Initially system is at rest

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