Alever has a mechanical advantage of 2.8. if you apply a force of 120 n to the lever , how much force does the lever apply to the object you are lifting?

The force applied to the object is equal to 336N.

Why?

To solve the problem, we need to use the formula to calculate the mechanical advantage. We must remember that the mechanical advantage is a relationship between the force output and input.

For simple machines, we can calculate the mechanical advantage using the following formula:

We know that the mechanical advantage of the lever is equal to 2.8 while the applied force (input) is equal to 120N, so, calculating we have:

Hence, we have that the force applied to the object is equal to 336N.

Have a nice day!

we need to know the time interval during which the force acts. impulse of force = momentum change