Samantha builds a lever to lift objects in a science experiment. The load arm is 0.4 meters. If she wants the lever to have a mechanical advantage of 8, how long should the effort arm be?(1 point)

Question

Responses

0.05 m
0.05 m

8.4 m
8.4 m

7.6 m
7.6 m

3.2 m

Answer 1

The mechanical advantage of a lever is calculated by dividing the length of the load arm by the length of the effort arm. In this case, the desired mechanical advantage is 8 and the load arm is 0.4 meters.

Effort arm = Load arm / Mechanical advantage
Effort arm = 0.4 m / 8
Effort arm = 0.05 m

Therefore, the length of the effort arm should be 0.05 meters.