Question

35.Assertion : Force is required to move a body uniformly along a circle. Reason : When the motion is uniform, acceleration is zero.

1 point

(a) Assertion is correct, reason is correct; reason is a correct

explanation for assertion.

(b) Assertion is correct, reason is correct; reason is not a

correct explanation for assertion

(c) Assertion is correct, reason is incorrect

(d) Assertion is incorrect, reason is correct.

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Answer 1

Assertion is correct , Reason is incorrect

Answer 2

(b) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

• When a body is moving in a circle the direction of motion of the body chages due to which the velocity of the body changes.
• But the speed of the body remains the same.
• The first law of motion states that force is required to change the state of a body.
• In a uniform motion acceleration is zero.
• Therefore, in a circular motion, the direction of the velocity of the body is changing so the acceleration cannot be zero.

Hence, option (b) is the correct answer.