Question

A ball thrown vertically upwards from a point P on earth reaches a point Q and returns back to earth striking at a point R. Draw speed-time graph to depict the motion of the ball (Neglect air resistance).

Answer 1

• 
• A ball which is thrown up with a certain initial speed goes up with decreasing speed to a certain height where its speed becomes zero.
• Now, during its downward motion, the speed goes on increasing from zero and reaches its initial value when it strikes the ground.
• The speed-time graph for the motion of a ball is as shown in the figure.