a. A rail road car of mass M is moving without friction on a straight horizontal track with a veloc
Channel: Doubtnut
Date: 2020-07-12

a. A rail road car of mass M is moving without friction on a straight horizontal track with a velocity ct. A man of mass m lands on it normally from a helicopter. What will be the new velocity of the car? ltbgt b. If now the man begins to run on it with speed um with respect to car in a direction opposite to motion of the car, what will be the new velocity of the car?