Question

Using a pulley system with a mechanical advantage of 15, how large and imput force would be needed to lift a piano weighing 345 N?

N =Fi

Answer 1

5175 Newtons

Step-by-step explanation:

We are given;

• Mechanical advantage is 15
• Output force is 345 N

We are required to calculate the work input;

• We need to know that mechanical advantage is the ratio of output force to input force.

• That is, mechanical advantage = Output force ÷ input force

• Rearranging the formula;

Input force =Output force ÷ Mechanical advantage

• Therefore;

Input force = 345 N × 15

= 5175 Newtons

Thus, the work input of a pulley system is 5175 N