# What is the formula for velocity ratio of a simple wheel and axle?

**velocity ratio**of the system= 2pR/2pr = R/r. Thus the

**velocity ratio**of a

**wheel and axle**is the

**ratio**of the radius of the

**wheel**to the radius of the

**axle**.

Besides, what is the formula of velocity ratio?

**Velocity Ratio**=d'÷d. A measure of the force amplification available with the system is the **velocity ratio**, or the **ratio** of the **velocity** (VF) with which the operator pulls the rope at F to the **velocity** at which the weight W is raised (V^W).

Furthermore, how do you find the effort force of a wheel and axle? In order to calculate the mechanical advantage of a **wheel** and axel, you can divide the radius of the **wheel** by the radius of the **axle**. If a **wheel's** radius is 60cm and its **axle** is 30cm, what is the mechanical advantage of the **wheel and axle**? The output **force** of the **wheel and axle** is 2 times greater than the input **force**.

Then, what is velocity ratio of a simple machine?

**Velocity ratio** of **simple machine** is the **ratio** of distance travelled by effort to the distance travelled by load in the **machine**. The efficiency of a **simple machine** is defined as the **ratio** of useful work done by **machine** (output work) to the total work put into the **machine** (input work).

What is meant by the velocity ratio of a machine is 5?

A simple mechanical lever with fulcrum is nothing but the simple **machine**. Another term is involved in the simple **machine** that is **velocity ratio** which is simply the **ratio** of the distance by which effort moves to the distance by which load moves.