Question

A man is pushing a car but it is not moving. Which of the following is correct about the situation?
A. Force is applied
B. Force is not applied
C. Force may or may not be applied
D. None of these

Answer 1

Hint:In order to answer this question, to know the condition whether the force is applied or not when a man is pushing a car but it is not moving, we will first write the correct answer and then state the reason behind the exact option.

Complete answer:
To affect the motion of an object, a force must overcome the object's static friction while it is at rest or dynamic friction while it is in motion. There will be no change if the applied force is smaller than the friction force. Similarly, a force is applied when a man is pushing a car but it is not moving. So, in this case a force applied by the man is less than its friction force.

The object will not move if the frictional force (also known as the Static Force) is greater in magnitude than the applied force. The item is not going to accelerate. Only the item will move if the applied force is larger than static. Or in other words, if the frictional force (also known as the Static Force) is less than the force exerted, the object will not move. The item is not going to accelerate. Only the item will move if the applied force is larger than static.

Hence, the correct option is A.

Note:Friction is a force that acts as a response force. It rises in proportion to the applied force. Let's say the applied force can increase indefinitely, but friction can't; it hits a limit and then decreases. Yes, it is possible. Frictional force can be equal to or greater than applied force.