Question

a person move forward when sudden breaks are applied​

Answer 1

Answer:

when the person is sitting then his body is at rest. By the sudden use of breaks his body experiences a force

Answer 2

Answer:

due to inertia of motion

Explanation:

when sudden the brakes are  applied, the lower part of the body comes in rest due to contact with the vehicle while upper part of the body remains in motion for some time due to inertia of motion, so person moves forward.