A cube of mass 3 kg is kept on a frictionless horizontal surface. The block is given an impulse so that point ‘A’ acquires velocity 4 m/s in the direction shown. If speed of point B is 4 
m/s, then kinetic energy of block is
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(16 J)
Sol.
Let angular velocity about Centre of mass be ‘ 
’ and velocity centre of mass be v CM
= 
= 40 rad/sec (a = 10 cm)
v = v A sin 45° = 
K.E = 
= 16J
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