Mechanical systems quiz

You apply a force of 18 N on to the end of a lever to open a paint can lid. The

resistance of the lid is 9 N. Calculate the MA.

(a)  

You apply a force on a crowbar to open a stuck door. The effort length of the

crowbar is 26 cm long and the resistance length is 4 cm. Find the MA of the crowbar.

(a)  

A worker uses a board that is 4 m long to pry up a boulder. A small rock is used for

a fulcrum and is placed 0.5 m from the resistance end of the lever. Calculate the MA of the board.

(a)  

Calculate the mechanical advantage if 500N force is needed to overcome the load of 1000N.

(a)  

What part of the human body acts as the fulcrum in all lever systems?

(a)  

a simple machine that consists of two

back-to-back inclined planes

a simple machine made of a rigid bar that

pivots at a fixed point

the point at which a lever pivots

Which simple machines make a pair of scissors?

What simple machines are used in a furniture dolly?