Question

A car is standing at rest at a distance of 2 m in the east direction from a tree. Which of these statements holds true for this scenario?

• A. The car would be at rest unless someone pushes.
• B. The car would be at motion if two forces of same magnitude act in opposite directions.
• C. The net force acting on the car is zero.
• D. The net force acting on the car is non-zero.

Answer 1

Answer: (A), (C)

The correct options are
A The car would be at rest unless someone pushes.
C The net force acting on the car is zero.

The position of the car remains fixed with respect to time. This means that the car is at rest and there is no change in its state of motion. Hence, the net force on the car is zero. The gravitational force acting on the car is cancelled out by normal force from ground on the car. To move the car, a net external force would be required.