Standard Science Primary 6 Interactions

Why is it easier to move a heavy cabinet using a trolley with wheels compared to pushing it across the floor?

A The wheels increase the mass of the cabinet.
B Rolling friction is less than sliding friction.
C The wheels increase the gravitational pull.
D Wheels eliminate friction completely.
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Worked Solution

Step 1: Pushing a cabinet involves sliding friction. Step 2: Wheels use rolling motion. Step 3: Rolling reduces the contact area and force of friction.

Correct answer: Rolling friction is less than sliding friction.

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