Question

a crowbar is 150 cm of length . its fulcrum is at a distance of 15 cm from the load . what is its mechanical advantage​

Answer 1

Answer:

its mechanical advantage is 2.

Explanation:

Load arm = 50 cm.

Effort arm = 150-50cm = 100 cm.

MA = length of effort arm/length of load arm.

MA = 100/50 = 2

Answer 2

Answer:

the answer is 9

Explanation:

The following is the explanation for the same

To find the mechanical advantage of an instrument the two important things to note are the load and the effort arm.

Given: Load arm = 15cm

effort arm = Total length - load arm

= 150 - 15 = 135 cm

Mechanical Advantage (MA) = Length of effort arm/ length of load arm= 135/15 = 9

Thus, one should note that to find the mechanical advantage , it is important to have the ratio of the effort and load arm which can determined through the fulcrum.