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

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion.
B. If both assertion and reason are ture but reason is not the correct explanation of assertion.
C. If assertion is ture but reason is false.
D. If both assertion and reason are false.

Answer

A

Explanation

Suppose the roller is pushed as in figure (b). The force `F` is resolved into two components, horizontal components `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 [fig(a)] the vertical component is opposite to its weight. Thus weight is reduced. So pulling is easier than pushing the lawn roller.