Question

which is a wrong statement
A)Action and reaction forces occur in pair only
B)Action and reaction forces are always equal in magnitude
C)Action and reaction forces act on different bodies
D)Action and reaction forces act in the same direction

Answer 1

The incorrect statement is statement 3 ie they act on the same body. Action and reaction are equal and opposite in direction. they act as pairs on two different bodies.

Answer 2

The wrong statement is D) Action and reaction forces act in the same direction.

Explanation:

Newton's Third Law of motion states:

• "For every force of action, there is an equal and opposite force of reaction".
• Force exists in pairs.
• Action-Reaction force is equal in magnitude and opposite in direction.
• Both the forces act on different bodies.
• A ball of mass $m$ kept on a table exerts a force of magnitude $mg$ on the table in the downward direction. $g$ is the gravitational acceleration. This action force is weight of the ball.
• In reaction, table also exerts a force with the magnitude  $mg$ in the upward direction on the ball. This is why the ball does not fall down. This reaction force is called normal, which acts perpendicularly upwards.
• Both the action and reaction force is opposite to each other in direction.
• Both action and reaction force is acting on different bodies, ball exerts action force on table and table exerts reaction force on ball.