a construction wo4rker uses a board and log as a lever to lift a heavy rock. If the input arm is 3 meters long and the output arm is 0.75 meters long, what is the mechanical advantage of the lever?
What is 3/.75?
To determine the mechanical advantage of the lever, you need to divide the length of the input arm by the length of the output arm. In this case, the input arm is 3 meters long and the output arm is 0.75 meters long.
To calculate the mechanical advantage:
Mechanical Advantage = Input Arm Length / Output Arm Length
Mechanical Advantage = 3 meters / 0.75 meters
Simplifying the division:
Mechanical Advantage = 4
Therefore, the mechanical advantage of the lever is 4.