A lever has a mechanical advantage of 4. Its input arm is 60 centimeters long. How long is its output arm?

60/4 = ___

60/4=20

To determine the length of the output arm, we can use the formula for the mechanical advantage of a lever:

Mechanical Advantage = Length of input arm / Length of output arm

We are given that the lever has a mechanical advantage of 4 and the length of the input arm is 60 centimeters. Let's substitute these values into the formula:

4 = 60 centimeters / Length of output arm

To find the length of the output arm, we can rearrange the formula to solve for it:

Length of output arm = Length of input arm / Mechanical Advantage

Plugging in the given values, we have:

Length of output arm = 60 centimeters / 4

Simplifying the expression, we find that the length of the output arm is:

Length of output arm = 15 centimeters

Therefore, the length of the output arm is 15 centimeters.