91影视

The free body diagram is a pictorial representation of an object under some forces where the objects act as the particle and the forces acting on the object.

• The mighty leaper is jumping with an acceleration of $4m/s^2$.
• When the leap hopper is jumping up, there must be a long-range gravitational force acting downwards.
• Vertically upward, there must be a normal force as the leap hopper is in the contact of the ground that exerts an upward force on the champion jumper before it starts jumping.
• Therefore, there is a net upward force due to which the leap hopper is jumping up and lasts there for $1ms.$

Thus, the free-body diagram should be as follows:

The mighty leaper is jumping upward with an acceleration of $4m/s^2.$

The force that the ground exerts on leap hopper is called the normal force which acts vertically upward, parallel to the direction of motion.

• While the leaf hopper is in the act of jumping, it experiences an upward acceleration. So, the net force acting on it must be upward.
• The normal force and the force due to gravity are acting in the vertical direction.
• Thus, the force of the ground on the leap hopper, known as normal force must be greater than the force due to gravity so that the net force act along upward direction.