Question

Suppose you want to level a field using a lawn roller. Would you prefer to push or pull it? Why?

• A. only if the objects are solid
• B. only if one of the two objects is liquid
• C. only if one of the two objects is gaseous
• D. irrespective of whether the objects are solid, liquid or gaseous

Answer 1

The correct option is D irrespective of whether the objects are solid, liquid or gaseous

It would be better to pull the lawn roller. This is because a part of the applied force reduces normal force (pressing force). As a result of this, friction reduces and less effort is required.