A high jumper successfully clears the bar. Is it possible that his centre of mass crossed the bar from below it? Try it with appropriate figures.

A man whose mass is m kg jumps vertically into air from the sitting position in which his centre of mass is at a height h_(1) from the ground. When his feet are just about to leave the ground his centre of mass is at height h_(2) from the ground and finally centre of mass rises to h_(3) above the ground when he is at the top of the jump. what is the average upward force exerted by the ground on him?

From a circular disc of radius R , a triangular portion is cut (sec figure). The distance of the centre of mass of the remainder from the centre of the disc is -

List-I shows some arrangements in which motion of masses are described and list-II defines motion of centre of mass of the system (m + M). Match appropriate possible options in list-II

A thin uniform bar of length L and mass 8m lies on a smooth horizontal table .Two point masses m and 2 m are moving in the same horizontal plane from opposite sides of the bar with speeds 2v and v respectively .The masses stick to the bar after collision at a distances (L)/(3) and (L)/(6) respectively from the center of the bar if the bar starts rotating about its center of mass as result of collision the angular speed of the bar will be

A uniform bar with mass m lies symmetrically across two rapidly rotating fixed rollers. A and B with distance 'l' between the bars centre of mass and each roller. The rollers whose direction of rotation are shown in figure slip against the bar with coefficient of friction mu . Suppose the bar is displaced horizontally by a small distance 'x' and then released, find the time period of oscillation.

The following table gives the height of five trees in a garden. If the given data has to be represented as a bar graph, then select the most appropriate scale from the given options that can be used to draw the bar graph. 1 unit = 8 trees

The following table gives the height of five trees in a garden. If the given data has to be represented as a bar graph, then select the most appropriate scale from the given options that can be used to draw the bar graph. 1 unit = 5 trees

The following table gives the height of five trees in a garden. If the given data has to be represented as a bar graph, then select the most appropriate scale from the given options that can be used to draw the bar graph. 1 unit = 1 trees