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The wheels against the ground, the axles against the wheels, the chain against the axles, the pedals against the chain, and your feet against the pedals.

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Q: What frictional forces help a bike to move?
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What is needed to move an objects?

A force. Such a force must be stronger than any frictional forces.


Why is friction greatest when an object is stationary?

Because the frictional force must be greater than forces that would cause the object to move. Example: a car parked on a slope does not move despite the force of gravity acting to pull it down the hill. Why? Because the frictional forces are greater than the forces of gravity.


Why do some objects move so fast and some move so slow?

The speed with which an object moves depends on its mass, any force applied on it (including frictional forces, which slow it down), and its previous history - i.e., if it has been moving before, it will have the tendency to continue moving, at least for a while, until frictional forces slow it down.


What would happen if a person was on a skateboard and that person pulled a cart by a cord?

It depends on the frictional forces and the masses. If the frictional forces were the same and the masses were equal, then the cart and the person on the skateboard would both move towards each other. If the mass of the cart were much bigger then the cart would move much less with the skateboarder moving most of the distance, if the cart were very light, then the skateboarder would move very little and the cart would move most of the distance. A higher frictional force in either of the two and the movement would be less for that system.


What is the force that causes things to move in space?

A force can cause an object to move if the amount of the force in the direction of movement is larger than the Frictional force of the object against the object on which it rests, and can overcome its Inertia.


What are the conditions for an object to stay at restto keep moving at constant velocityor to move with increasing velocity?

You have three separate situations here:1. Object stays at rest. The force on the object is not great enough to overcome its frictional forces, or its inertia.2. Object keeps moving at constant velocity. The object's inertia and frictional forces are exactly balancedby the Force exerted on it.3. Object moves with increasing velocity (acceleration). The Force on the object exceeds that necessary to overcome its inertia and its frictional forces.


If the bikers are applying unbalanced forces to their bikes to move them?

They have to get the bike started by using an engine that has to make the forces unbalanced to get the bike to progress forward and once you have reached a constant speed then you will become unbalanced once you have accelerated once again.


What are friction forces?

The frictional forces refers to the force that resists the relative motion of the fluid layers and the solid surfaces. It usually resists the given material elements from sliding against each other.


VISCIOUS DRAG / VISCOSITY?

Opposing / Frictional force involving a fluid. It limits the speed with which a body can move in a liquid


How could you reduce frictional forces so that a bicycle move more effiently?

The rider can wear tight fitting, slick clothes and assume a hunched down posture to cut down on wind resistance. The bike can use well lubricated moving parts and tires with low rolling resistance.


When you use the handbrakes on a bike what force do you apply?

The force you apply is technically called applied force. It is transfered and used to move the brake pads together. At that point, the frictional force between the brake pads and the tire slows down the tire.


Frictional unemployment?

it takes workers some time to move from one job to another