First slide

Gravitational force and laws

Question

What does not change in the field of central force

Moderate

A

Potential energy
B

Kinetic energy
C

Linear momentum
D

Angular momentum

Solution

For central force, torque is zero.
$∵ τ = \frac{dL}{dt} = 0 \Rightarrow L = constant$
i.e. Angular momentum is constant.

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