Question

consider a cloud of point particles interacting through gravitational force and having a distribution of kinetic energy what is the conditioner potential energy under which this cloud will contract​

Answer 1

When a gravitational force is applied, Kinetic energy is maximum at the highest point. When. kinetic energy increases, the potential energy decreases

• work done on an object by the uninterrupted gravitational force, near the surface of Earth, over any rearrangement is a function only of the difference in the positions of the end-points of the rearrangement.
• This property allows us to define a different kind of energy for the system than its kinetic energy, which is called potential energy.
• In Motion in two and three dimensions, we look over the movement of a projectile, like kicking a football (Figure).
• The work done by the gravitational force on the football is negative. As the football rises, when we see vertically ball's displacement is positive and the force due to gravity is negative.
• We investigate the motion of a projectile, Motion in two and three dimensions, like kicking a football (in Figure).
• Let’s ignore friction and air resistance for this example. As the football rises, the work done by the gravitational force on the football is negative.
• When we see vertically the movement of the ball is positive and the force due to gravity is negative.

• Until it reached its highest point in the motion, the ball slowed down thereby decreasing the ball’s kinetic energy.
• The gravitational potential energy is gained by loss in potential energy.

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