Question

The boy applying the input force moves so that he is 1.5m from the fulcrum. the seesaw applies an output force to the other boy who is 2m from the fulcrum. what is the new ideal mechanical advantage?

Answer 1

The new ideal mechanical advantage is 0.75.

Step-by-step explanation:

The ideal mechanical advantage of a lever is calculated by dividing the input distance from the fulcrum by the output distance. In this case, the boy applying the input force is 1.5m from the fulcrum, and the other boy receiving the output force is 2m from the fulcrum. Therefore, the new ideal mechanical advantage is calculated as:

New Ideal Mechanical Advantage = Input Distance / Output Distance

New Ideal Mechanical Advantage = 1.5m / 2m = 0.75

Answer 2

Mechanical advantage is defined as the ratio of output force and input force

so we can say it is

`\eta = (F_(out))/(F_(in))`

now here we know that on a see saw torque is balanced

so we can say

`F_1r_1 = F_2r_2`

so here it is given as

`F_(in)* 1.5 = F_(out) * 2`

so here we can say

`\eta = (F_(out))/(F_(in)) = 0.75`

so mechanical advantage will be 0.75