Question

15. A pulley system is set up to help lift a car off the ground. If the car has a mass of 1440 kg, and it requires a force of 4.75 kN to lift the car, what is the mechanical advantage of the pulley system?

Answer 1

Answer:

MA = 3.03

Explanation:

We are given;

• The mass of a car as 1440 kg
• Input force to lift the car is 4.75 kN

We are required to calculate the mechanical advantage of the pulley;

• We need to know how mechanical advantage is calculated.
• Mechanical advantage = Output force ÷ Input force

• In this case; Output force = 1440 × 10N/kg

                                                   = 14400 N

Therefore; Mechanical advantage = 14400 N ÷ 4750 N

                                                         = 3.03

Thus, the mechanical advantage of the pulley is 3.03