Read the scenario.
A cyclist is riding his bike at a constant speed of 5 m/s, and experiences a frictional force between the bike and sidewalk of 100 N. The cyclist then changes his speed to 10 m/s.
What effect does this increase in speed have on the frictional force between the bike and sidewalk?
3 answers
The increase in speed from 5 m/s to 10 m/s does not directly affect the frictional force between the bike and sidewalk. Frictional force depends on the normal force and the coefficient of friction between the surfaces in contact. In this scenario, the normal force and the coefficient of friction between the bike and sidewalk remain constant, so the frictional force will also remain constant at 100 N.
Read the scenario.
A cyclist is riding his bike at a constant speed of 5 m/s, and experiences a frictional force between the bike and sidewalk of 100 N. The cyclist then changes his speed to 10 m/s.
What effect does this increase in speed have on the frictional force between the bike and sidewalk?
The frictional force increases, but does not double because although friction increases with increasing speed, it does not increase as fast.
The frictional force between the bike and sidewalk stays the same because speed does not affect frictional force.
A cyclist is riding his bike at a constant speed of 5 m/s, and experiences a frictional force between the bike and sidewalk of 100 N. The cyclist then changes his speed to 10 m/s.
What effect does this increase in speed have on the frictional force between the bike and sidewalk?
The frictional force increases, but does not double because although friction increases with increasing speed, it does not increase as fast.
The frictional force between the bike and sidewalk stays the same because speed does not affect frictional force.
The second statement is correct - the frictional force between the bike and sidewalk stays the same because speed does not affect frictional force.
1 answer