Question

A vehicle is moving on a rough road in a straight line with uniform velocity. Then

• A. no force is acting on the vehicle
• B. a force must act on the vehicle
• C. an acceleration is being produced in the vehicle
• D. no work is being done on the vehicle

Answer 1

The correct option is B a force must act on the vehicle

Since the vehicle is moving with uniform velocity, thus its acceleration must be zero. The friction force exerted by the road on its tires equals the force provided by its engine. So, the acceleration of the vehicle is zero and thus the vehicle moves with uniform velocity.