Question

Which picture shows a pulling force?
 $ \left( A \right) $

 $ \left( B \right) $

 $ \left( C \right) $

 $ \left( D \right) $

Answer 1

Hint :In order to solve this question, we need to analyze the pictures given in each option one by one. We need to see what types of forces are acting in each picture and is it a pulling force or a pushing force. The picture that is showing the pulling nature of the force, is chosen as the correct option.

Complete Step By Step Answer:
Let us start by considering the option $ \left( A \right) $ . In this the forces acting on the football are: friction, and the force applied by the child in the opposite direction which is the pushing force.
In option (B) , the net force that is acting is again the force applied by the kid on the basketball in the downwards direction, and its reaction. So, no pulling force.
In option (C), the net force is acted on the kid in the pram by the woman in the opposite direction, again the pushing force.
In option (D), the force that is the gravitational pull, pulling the object downwards away from the tree. Hence, the only pulling force is in this case. Thus, option $ \left( D \right) $ is the answer.

Note :
A pull force means moving something or some object towards you while a push force means moving something or some object away from you. The work done on a pull force is negative while the work done on a push force is positive. However if the same force is applied, then the magnitude is the same.