A student investigates friction by pulling a wooden block across different surfaces using a forcemeter. The block moves at constant speed across each surface. Which surface has the greatest friction?

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Question

A student investigates friction by pulling a wooden block across different surfaces using a forcemeter. The block moves at constant speed across each surface. Which surface has the greatest friction?

Accepted Answer

The surface where the forcemeter reads 4.8 N — 8 N). Award 1 mark for recognising that at constant speed, the pulling force equals the friction force. The highest forcemeter reading indicates the greatest friction. A, C, and D show lower friction values.

Answer

The surface where the forcemeter reads 4.8 N

Answer

The surface where the forcemeter reads 2.5 N

Answer

The surface where the forcemeter reads 3.6 N

Answer

The surface where the forcemeter reads 1.2 N

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