You use a lever to lift a heavy tree branch. You apply a force of 30 N and the lever lifts the branch with a force of 120 N. What is the mechanical advantage
of the lever?
A. 4
B. 0.25
C. 2
D. 90

4

Explanation:

Given parameters:

Force input  = 30N

Force output  = 120N

Unknown:

Mechanical advantage of the lever  = ?

Solution:

The mechanical advantage is the  quantity that describes how much a simple machine is able to multiply force.

This is expressed as:

        Mechanical advantage  = Force output / Force input

   Mechanical advantage  =   = 4

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

a, c, d, e are all applying about success strategies.