Assertion: For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law. Reason: The sum of work done by the two forces must always cancel.

Question

Assertion: For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law. Reason: The sum of work done by the two forces must always cancel. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law.
i.e.

F_{12} + F_{21} = 0

But the sum of the work done by the two forces need not always cancel.
i.e.

W_{12} + W_{21} \neq = 0

However, it may sometimes be true.

Q. Assertion : For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law. Reason : The sum of work done by the two forces must always cancel.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law. i.e. F12​+F21​=0 But the sum of the work done by the two forces need not always cancel. i.e. W12​+W21​=0 However, it may sometimes be true.

Q. Assertion : For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law.
Reason : The sum of work done by the two forces must always cancel.

For two bodies, the sum of the mutual forces exerted between them is zero from Newtons third law.
i.e. $F_{12} + F_{21} = 0$
But the sum of the work done by the two forces need not always cancel.
i.e. $W_{12} + W_{21} \neq = 0$
However, it may sometimes be true.