Home
Class 12
PHYSICS
Assertion:- In equilibrium net force on ...

Assertion`:-` In equilibrium net force on the body is zero.
Reason `:-` A body in equilibrium must be at rest.

A

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

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are False

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and the reason provided: **Assertion:** In equilibrium, the net force on the body is zero. **Reason:** A body in equilibrium must be at rest. ### Step-by-Step Solution: 1. **Understanding Equilibrium:** - Equilibrium refers to a state where a body experiences no net force acting upon it. This means that all the forces acting on the body are balanced. 2. **Net Force and Acceleration:** - According to Newton's second law of motion, the net force (F) acting on a body is equal to the mass (m) of the body multiplied by its acceleration (a): \[ F = m \cdot a \] - If the net force is zero (F = 0), then the acceleration must also be zero (a = 0). 3. **Implications of Zero Acceleration:** - Zero acceleration means that the velocity of the body is constant. This constant velocity can be either zero (the body is at rest) or a non-zero value (the body is moving with a constant speed). 4. **Conclusion on the Assertion:** - The assertion is true: In equilibrium, the net force on the body is indeed zero. 5. **Analyzing the Reason:** - The reason states that a body in equilibrium must be at rest. However, as we have established, a body in equilibrium can also be moving with a constant velocity (not necessarily at rest). 6. **Conclusion on the Reason:** - The reason is false: A body in equilibrium does not have to be at rest; it can be in motion with constant velocity. 7. **Final Evaluation:** - Since the assertion is true and the reason is false, the correct answer is that the assertion is true, but the reason is false. ### Final Answer: - Assertion is true, Reason is false.
To solve the question, we need to analyze the assertion and the reason provided: **Assertion:** In equilibrium, the net force on the body is zero. **Reason:** A body in equilibrium must be at rest. ### Step-by-Step Solution: 1. **Understanding Equilibrium:** ...
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

When a body is under certain stress, is it equilibrium ?

In net force on a rigid body is zero. Then, match the following table.

State the conditions required by a body to be in equilibrium.

Assertion : The equilibrium constant for the reverse reaction is equal to the inverse of the equilibrium constant for the forward reaction . Reason : The value of equilibrium constant is independent of initial concentrations of the reactants and products.

Assertion: At equilibrium the concentration of all reactants and products are equal. Reason : At equilibrium , the rate of forward reactions is equal to the rate of backward reactions.

Asseration : In circular motion work done by all the forces acting on the body is zero. Reason : Centripetal force and veloity are mutually perpendicular.

A : For a body to be in rotational equilibrium the net torque acting on the body about any point is zero. R : For net torque to be zero, net force should also be zero.

Assertion : The condition of equilibrium for a rigid body is Translational equilibrium Sigma F=0 and Rotational equilibrium Sigma tau=0 Reason : A rigid body musy be in equilibrium under the action of two equal and opposite forces.

Assertion: The familiar equation mg=R for a body on a table is true only if the body is in equilibrium. reason: The equality of mg and R has no connection with the third law.