Question

These questions consist of two statements each, printed as Assertion and Reason. While answering these Questions you are required to choose any one of the following four responses.

A. If both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
B. If both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False
D. If both Assertion and Reason are false.

Assertion :- The potential energy of a particle varies with distance x as shown in figure. The force acting on the particle is zero at points C and E.

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Reason :- Potential energy is defined only for conservative force field.
(1) A (2) B (3) C (4) D

Answer 1

Answer on Question #41245 – Physics – Mechanics | Kinematics | Dynamics

These questions consist of two statements each, printed as Assertion and Reason. While answering these Questions you are required to choose any one of the following four responses.

A. If both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.

B. If both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.

C. If Assertion is True but the Reason is False

D. If both Assertion and Reason are false.

Assertion: - The potential energy of a particle varies with distance $x$ as shown in figure. The force acting on the particle is zero at points C and E.

Reason: - Potential energy is defined only for conservative force field.

(1) A (2) B (3) C (4) D

Solution

Assertion is True. The force acting on the particle is zero at points C and E, because at these points the derivative of potential energy of a particle is zero. The force acting on the particle is

$$F (x) = - \frac {d U}{d x}.$$

So, the force acting on the particle is really zero at points C and E.

Reason is false. It does not concern to our assertion.

Answer: (3) C.

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