A speeding car will stop if the brakes are applied, even if there is no friction.

True

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False

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Solution

The correct option is B False
Friction is required to stop a moving car. When the brakes are applied, it applies a friction force on the wheels to slow it's rotation which eventually leads to the change in speed of the vehicle. If there is no friction, the car will not stop and the brakes would be of any use.

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Similar questions

When a car moves on a road, then the bottommost point is always at rest relative to the ground at that particular instant and since friction only opposes relative motion between two bodies then according to this there should be no friction acting on the bottommost point of the wheel. If this is the case then according to Newton's 1st law, the car should continue to move forever unless brakes are applied. But in reality this doesn't happen & as the accelerator is released the car moves for sometime & ultimately stops even though no brakes are applied. How is this possible?

Q. A car moving with speed u can be stopped in minimum distance x when brakes are applied. If the speed becomes n times, the minimum distance over which the car can stopped would take the value

Q. A car stops after

3 s

when brakes are applied. If the brakes offer a retardation of

5 m s^{- 2}

, what was the initial velocity of the car?

Q. Brakes are applied to a car so as to produce retardation of 5m/s². If the car takes 1.5 s to stop after applying the brakes calculate the distance travelled by it?

Q. A car moving with speed v on a straight road can be stopped with in distance d on applying brakes. id same car is moving with speed

3

v and brakes provide half retardation, then car will stop after travelling distance.

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