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

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If both statement I and statement II are true and statement II is the correct explanation of statement I.

If both statement I and statement II are true but statement II is not the correct explanation of statement I.

If statement I is true but statement II is false

If both statement I and statement II are false

answer is A.

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Detailed Solution

Suppose the roller is pushed as in figure (b). The force F is resolved into two components, horizontal component FH 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.

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