A vehicle is moving along the positive x-direction, if a sudden brake is applied, then _______.
A. frictional force acting on the vehicle is along negative x-direction
B. frictional force acting on the vehicle is along the positive x-direction
C. no frictional force acts on the vehicle
D. frictional force acts in a downward direction
Answer:A
A vehicle is moving along the positive x-direction, if a sudden brake is applied, then _______.
A. frictional force acting on the vehicle is along negative x-direction B. frictional force acting on the vehicle is along the positive x-direction C. no frictional force acts on the vehicle D. frictional force acts in a downward direction