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

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Both assertion and reason are true and the reason is the correct explanation of the assertion.

Both assertion and reason are true but reason is not the correct explanation of the assertion

Assertion is true and reason is false

Assertion and reason both are false

answer is A.

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Detailed Solution

Suppose the roller is pushed. The force F is resolved into two components, horizontal component $F_{H}$ which helps the roller to move forward, and the vertical component acting downwards adds to the weight. Thus weight is increased.

But in the case of pull , the vertical component is opposite to its weight. Thus weight is reduced. So pulling is easier than pushing the lawn roller.

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