PH-1445
Friction and air resistance
Physics · Secondary 4 · Hard · Friction and air resistance
A 500 g block rests on a horizontal surface. The coefficient of friction between the block and the surface is 0.40. Take . What is the frictional force just before the block starts to move?
- 0.20 N
- 2.0 N
- 5.0 N
- 12 N
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