When the breaks in a car are applied the fricti... - JAMB Physics 2021 Question
When the breaks in a car are applied, the frictional force on the tyres is...?
A
a disadvantage because it is in the direction of the motion of the car
B
a disadvantage because it is in the opposite direction of the motion of the car
C
an advantage because it is in the direction of the motion of the car
D
an advantage because it is in the opposite direction of the motion of the car
correct option: d
The frictional force opposes the motion. Friction braking is the most commonly used braking method in modern vehicles. It involves the conversion of kinetic energy to thermal energy by applying friction to the moving parts of a system. The friction force resists motion and in turn generates heat, eventually bringing the velocity to zero. More.
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