MACHINES

A machine with a ratio greater than 1:

• multiplies the input force so the machine would be good to help move heavy objects.

• does not multiply the force, but increases distance and speed.

• is good for lifting and moving objects quicker.

• Is not good for lifting or moving objects quicker.

A machine with a ratio greater than 1:

• multiplies the input force so the machine would be good to help move heavy objects.

• does not multiply the force, but increases distance and speed.

• is good for lifting and moving objects quicker.

• Is not good for lifting or moving objects quicker.

A hammer has no moving parts, can I consider a hammer to be a simple Machine ?

• Yes

• No

Suppose you applied a force of 200 newtons to a simple machine to lift a box that weighed 1000 newtons. The Machine would Multiply your force by ?

• 10

• 5

• 15

• 20

Machines multiply your force?

• yes

• No

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.

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 closer the threads the less force needed but require more turns.

• MA of Lever

• MA of Screw

• MA of Wedge

• MA of Pulley