Assertion :Pulling a lawn roller is easier than pushing it. Reason: pulling decreases the apparent weight as the vertical component of the pulling force acts upward.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
When a body is pulled by a force , one component of force is acting perpendicular to the normal surface opposite to weight direction. This tries to minimize to the normal force exerted by the surface. If normal force be lesser, then friction force will be lesser because
$f r i c t i o n f o r c e \propto n o r m a l c o m p o n e n t o f f o r c e$ .
When a body is pushed by a force ,it increases the normal force.

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(c) Assertion is correct, but reason is incorrect
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