Contents

- 1 How do you calculate the force required to rotate a wheel?
- 2 How much torque is required to move a bicycle?
- 3 What is force rotating?
- 4 What is the law of inertia for rotation?
- 5 Can you have negative torque?
- 6 How do you calculate engine requirements?
- 7 How much force do you need to pedal a bike?
- 8 How do I calculate torque?
- 9 How much torque can a human leg generate?
- 10 Why is centripetal force not a real force?
- 11 How does rotation increase stability?
- 12 Does centrifugal force exist in space?
- 13 What factors affect rotational inertia?
- 14 Why does bending your legs when running Enable?
- 15 What are the three principal axes of rotation for the human body?

## How do you calculate the force required to rotate a wheel?

The required tractive torque of the motor shall be equal to the tractive torque at wheel, T_{w} = F_{t}. r_{w}, (i.e. Tractive Torque = Tractive Force x mean wheel radius). So you must determine the acceleration required to reach you designed speed.

## How much torque is required to move a bicycle?

If you have a 5 cm radius wheel you would have a torque of 10 Nm (0.05 x 200), with a speed of 400 rpm (5 times greater than the speed of the pedals).

## What is force rotating?

Torque is a measure of the force that can cause an object to rotate about an axis. Just as force is what causes an object to accelerate in linear kinematics, torque is what causes an object to acquire angular acceleration. Torque is a vector quantity.

## What is the law of inertia for rotation?

Newton’s first law of inertia for rotating systems states that an object or system of objects will maintain its angular momentum unless acted upon by an unbalanced external torque. rotational velocity. When a direction is assigned to rotational spee.

## Can you have negative torque?

Technically, torque is also a vector – but that might be a little too much at this point. Oh, torque can be positive or negative. Let us say that a positive torque would make a stationary object rotate counter clockwise and a negative torque would make it rotate clockwise.

## How do you calculate engine requirements?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

## How much force do you need to pedal a bike?

An average cyclist generates about 183 watts while doing 19 mph or 30.4 kph. Power = force × velocity. Force of a pedalling applied by a human for achieving 30.4 kph = 183/8.44 = 21.68 newtons. This is for upright bicycles.

## How do I 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 much torque can a human leg generate?

How much maximum pedal force would the leg of an average person generate while cycling? – Quora. 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.

## Why is centripetal force not a real force?

“Centripetal force and centrifugal force are really the exact same force, just in opposite directions because they’re experienced from different frames of reference.” If you are observing a rotating system from the outside, you see an inward centripetal force acting to constrain the rotating body to a circular path.

## How does rotation increase stability?

A symmetric body with no torques applied with even a slight bit of internal damping (as all real object have) will eventually rotate about its principal axis with the lowest moment of inertia. The faster the spin (= higher angular momentum), the more effort it takes to alter the axis of the spin (= greater stability).

## Does centrifugal force exist in space?

Dave: In space, it is possible to create “artificial gravity” by spinning your spacecraft or space station. Technically, rotation produces the same effect as gravity because it produces a force (called the centrifugal force) just like gravity produces a force.

## What factors affect rotational inertia?

Indeed, the rotational inertia of an object depends on its mass. It also depends on the distribution of that mass relative to the axis of rotation. When a mass moves further from the axis of rotation it becomes increasingly more difficult to change the rotational velocity of the system.

## Why does bending your legs when running Enable?

Why does bending your legs when running enable you to swing your legs to and fro more rapidly? Bending your legs shortens them, thus reducing rotational inertia. It is the perpendicular distance from the rotational axis to the line along which the force acts.

## What are the three principal axes of rotation for the human body?

The three principal axes of rotation in the human body are the longitudinal axis, the transverse axis, and the medial axis. The three axes of rotation in the human body are at right angles to one another.