Question

You use a 160 cm plank to lift a large rock. If the rock is 20cm from the fulcrum, what is the plank’s IMA?

Answer 1

Answer:

IMA = 8

Explanation:

Given the following data:

Length of plank = 160cm

Length of resistance = 20cm

To find the ideal mechanical advantage (IMA);

$IMA= \frac {length \; of \; effort}{length \; of \; resistance}$

$IMA= \frac {160}{20}$

IMA = 8