# Question: Which type of force is used by your legs to pedal a bicycle?

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The friction force is used by your legs to pedal a bicycle.

## What force is used to ride a bicycle?

The primary external forces on the bike are gravity, ground, friction, rolling resistance, and air resistance.

## What force is used when the brakes on a bicycle slow it down?

friction between the brakes and wheel help bikes and cars to slow down.

## Why do you have to exert more force on the pedals of a bicycle when you have to first start than when you have attained a constant speed?

Acceleration of zero means that the net force is zero, not that there are no forces. 2. Why do you push harder on the pedals of a bicycle when first starting out than when moving at a constant speed? … In order to accelerate from rest, the net force must be greater than zero.

## How much torque does a bicycle produce?

Torque is force times radius. Assuming crank length 175mm and rider’s weight of 140 pounds, that gives us 80ft.lb or 109 NM torque when rider is standing and crank is *parallel to the ground*. The average torque will be much lower, something about 50NM.

## What law of motion is riding a bike?

Newton’s Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object). Riding your bicycle is a good example of this law of motion at work.

## Is riding a bike a balanced force?

When you ride a bike the force of the friction of the tires against the road is greater than the opposing force of friction with the air. The bicycle moves forward. This is an example of unbalanced forces. How do you know when forces are balanced?

## Why do bikes stop when pedaling?

When the rider stops pedalling the bicycle, the force of friction between the tyres of bicycle and the road acting in the direction opposite to the direction of motion of the bicycle, opposes the motion of the bicycle and this force is now unbalanced, thus slowing down the bicycle.

## Should you use both brakes on a bike?

The rear brake is O.K. for situations where traction is poor, or for when your front tire blows, but for stopping on dry pavement, the front brake alone provides the maximum stopping power, both in theory and in practice. If you take the time to learn to use the front brake correctly, you will be a safer cyclist.

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## What enables you to ride a bike without skidding and falling?

glencoe science

Question Answer
_____ enables you to ride a bike without skidding and falling rolling friction
appling the brakes uses ______to slow a vihical down slidng friction
in order to know how a force will affect an object, you must the_____ direction

## What effect does the force have on the bicycle?

When biking on a level road, your forward force comes from pushing and pulling on the pedals to make the back tyre push backwards against the road. The two main forces that oppose your motion are aerodynamic drag (air resistance) and rolling resistance of the tyres against the road caused as the tyre is compressed.

## How do professional bicycle riders reduce friction?

In order to move forward, the cyclist must push through the mass of air in front of her. This takes energy. … Direct friction occurs when wind comes into contact with the outer surface of the rider and the bicycle. Racing cyclists often wear “skinsuits” in order to reduce direct friction.

## What can you say about the acceleration of the bicycle?

The acceleration of the bicycle will depend on how much force exerted doing the pedal for the bicycle to accelerate. The muscle of your legs will be the source of force for the bicycle to move and you together with the bicycle provides the mass. Lesser mass and strong force will result to higher acceleration.

## How much torque can a human leg generate?

The torque generated is which would be 65 * 9.8 * 3.1416 * 0.15 * 2 which is about 600 Newton-meters at the exact 90 degree angle of the pedal when the person is standing on the pedal.

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## How do we calculate torque?

A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.

## How do I exert more torque?

Torque is the twisting force a rotating lever or wheel exerts on its axis. Increasing the length of a lever arm, like a wrench, exerts more torque on its bolt. The longer the lever arm, the more torque is produced by the same amount of force pushing on the end of the lever. 