1. THE PITCH OF A JACKSCREW SHOWN IN FIGURE BELOW IS 0.3 CM AND HAS A LEVER ARM OF 60 CM LENGTH. WHAT FORCE AT THE END OF THE LEVER ARM WILL RAISE A LOAD OF 190 KG IF THE EFFICIENCY OF THE MACHINE IS 12 %? Fo L = 60 cm p = 0.3 cm

A lever has the following dimensions: Resistive force distance: 15 cmEffort force distance: 85 cm If you can exert a maximum effort force of 800 N, what is the maximum resistive force you can lift with the lever?

An inclined plane at an angle of 15o is used to lift a 250 kg sofa through a vertical height of 5 meters.  If the coefficient of kinetic friction is 0.12, what is the Mechanical Advantage, Ideal Mechanical Advantage, and efficiency of the plane?

You are using a lever to lift the edge of a crate in order to slide a roller under it. The crate weighs 4250 N.  You are able to exert a force of 450 N and can move the handle of the lever 0.8 meters. The crates lift a distance of 0.05 meters. A) What is the Input work?     B) What is the efficiency of the lever    C) What is the levers actual mechanical advantage