Question

Give few examples where displacement of an object is in the direction opposite to the force acting on the object.

Answer 1

Hint: Generally the force is acted along the direction of the motion of the body. But you must not forget that the force is the rate of change of momentum of a body. Hence the force can act in the opposite direction of the displacement as well. It can accelerate and even decelerate.

Complete step by step answer:
Step 1:
When a body is moved upwards, a force is acted upon the body to take it upwards. But eventually, the force due to gravity pulls it downwards. But the body moves upwards.
Hence there is the direction of displacement opposite to the direction of the force acted up on that is gravity.
Step 2:
When a body is in motion on a surface, the surface tries to prevent the motion of the body. This is the friction. The frictional force always acts opposite to the motion of the body.
Hence friction is a force where the frictional force acts to the opposite direction of the displacement.
Step 3:
If two bodies are attached to the two ends of a pulley, then one body moves downward and the other moves upwards. Thus the body that moves upwards has gravity acting opposite to its direction of displacement. For the body that moves downwards has the tension of the string to be the force that acts opposite to the direction of the displacement.
Step 4:
When a body is in a motion under any unbalanced force, the body displaces to the opposite direction of the weaker force.
Final Answer:
A few examples where displacement of an object is in the direction opposite to the force acting on the object are 1) a body moving upwards against gravity, 2) a body moving against friction, 3) a body in a pulley system moves downwards against the tension of the string 4)a body moving against any weaker force due to a greater unbalanced force etc.

Note: The direction of motion is usually the direction of the change of the position of the object. That is actually the direction of motion. Any negative force with respect to the motion actually acts against the motion that is to the opposite direction of the motion. These negative forces are the forces which act opposite to the direction of the displacement.