Questions
A man stands at one end of a boat which is stationary in water. Neglect water resistance. The man now moves to the other end of the boat and again becomes stationary. The center of mass of the 'man plus boat' system will remain stationary with respect to water
detailed solution
Correct option is D
There is no external force acting on the system of 'man + boat'.⟹a→CM=0 ⇒ uCM=vCM Also the man as well as the boat are stationary initially i.e uCM=0 ⇒vCM=0 i.e their centre of mass will also remain stationary finally in all cases.Talk to our academic expert!
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Shown in the figure is a system of three particles of mass 1 kg, 2 kg and 4 kg connected by two springs. The acceleration of A, B and C at any instant are 1 ms-2, 2 ms-2 and 1/2 ms-2 respectively directed as shown in the figure external force acting on the system is:
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