Question

a crow bar of length 120 CM has its fulcrum situated at a distance of 20 cm from the load calculate the mechanical advantage of crowbar

Answer 1

Length of the crowbar = 120 cm

Load arm = 20 cm

Effort arm = 120-20 = 100 cm

MA = Effort arm

Load arm

MA = 100

20

MA = 5

Answer 2

Answer:

Mechanical advantage of the crowbar is 5.

Explanation:

Given :-

A crowbar is of length 120 cm.

It has its fulcrum situated at a distance of 20 cm from the load.

To find :-

The mechanical advantage of the crowbar.

Solution :-

Length of crowbar = 120 cm

Load arm = 20 cm

Effort arm = Length of crowbar - Load arm

• 120 cm - 20 cm
• 100 cm

Mechanical advantage = Effort arm ÷ Load arm

• 100 cm ÷ 20 cm
• 5

∴ Mechanical advantage of the crowbar is 5.