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A body of mass 10kg moving with speed 3m/s collides with another stationary body of mass 5kg. As a result the two bodies stick together. The KE of composite mass will be

Akanksha , 7 Years ago
Grade 11
anser 1 Answers
Sam

Last Activity: 7 Years ago

 
first we will conserve momentum
10 x 3  =  (10+5) x V
where V is the velocity of the composite mass
on solving we get v = 2 m/s
so KE =   mv2   =    (10+5).(2)2     =  (15).(4)    =   30 kg m2/sec2
                 2                   2                       2
 

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