The driver of the car applies brakes suddenly when he sees a dog running across the road. The car stops due to

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Frictional force

Gravitational force

Electromagnetic force

All of the above.

answer is A.

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Detailed Solution

The car stops due to Frictional force.
Friction is the force that resists the motion of an object when the surface of the object comes in connection with the surface of another object.
When force is applied to the brakes of the car, there is work done by the friction between the brakes and the wheel of the car. When we apply brakes to a vehicle, because of the retarding force it stops (comes to rest).
Other forces like gravitational force and electromagnetic force are non-contact forces. Hence they can’t play a role in stopping the car when brakes are applied.

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