A vehicle slows down on applying brakes. This happens because of
Magnetic force
Frictional force
Electric force
None of the above
On applying brakes, friction acts opposite to the motion of the vehicle. This causes a decrease in speed and eventually brings it to rest.
When the brake of a train is applied, it slows down. Which of the following force is responsible for it?
When the force applied by the moving vehicle is calculated, the actual force applied by the brakes may be slightly less than the one calculated theoretically. Why?