Question

Assertion :Pulling a lawn roller is easier than pushing it. Reason: Pushing increases the apparent weight and hence the force of friction.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

Answer: (A)

We know frictional force is proportional to normal force.
During pulling body has a tendency of go up which decreases Normal reaction. Hence friction force decreases.
But during pushing we apply force on body from above at some angle which increases normal reaction. So, friction force increases and it's tough to push the body than pull.
So, Above statement and reason both are correct and reason is correct explanation too.
A, is correct answer.