Question

Force are acting on the body as shown below

The body is at rest due to friction. The friction force is
(a) 50 N from right to left
(b) 50 N from left to right
(c) 10 N from right to left<
(d) 10 N from left to right

Answer 1

Option b -  The friction force is 50 N from left to right

Newton's second law

• According to Newton's third law, when a force is exerted on a body, the body must exert a force of equal magnitude and opposite direction, called friction.
• Here, the force exerted is 30 N and 20 N from the right as shown in the image below.
• Thus, it faces friction equal to 50N from left to right.

Thus, option b is correct.

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Answer 2

Answer:

option b is correct as it implies the second law of newton