Grade 8 Mechanical Advantage Part 1

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.

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 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.

The wheel of a small dirt bike has a radius of 30cm. The axle has a radius of 20cm. What is the mechanical advantage of the wheel and axle?

You are using a ramp to move a heavy box into a moving truck. If the length of the ramp is 4 m and the height into the truck is 1m, what is the mechanical advantage of the ramp?

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

The mechanical advantage of a steering wheel is 15. If the radius of the steering column (axle) is 5cm, what is the radius of the steering wheel?

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

What is the acronym which helps to remember which part of the lever is in the middle?

A pulley is similar to the wheel and axle simple machine in that it consists of a ______ wheel and axle.