A window in Patty O Cover house is stuck She takes an 8inch

A window in Patty O\' Cover house is stuck. She takes an 8-inch screwdriver to pry open the window If the screwdriver rests on the sill (fulcrum) 3 inches from the window and Patty O\' Cover has to exert a force of 10 pounds on the other end to pry open the window, how much force was the window exerting?

Solution

Here required force will be the product of total force applied on the body and its distance of force from the line of action.

Here required distance is 8-3=5

so required force = 10x 5 = 50 pounds.