Cams Cranks and Pulleys

What does this image represent?

• A pulley

• A wedge

• A lever

• A wheel and axle

Pulleys make work:

• Easier

• Harder

How do pulleys make work easier?

• They change the direction of a force

• They change the amount of force required

• the distance over which the force is applied

• the measurement of an object

What is a counterweight used for?

• To provide a balancing force

• To reduce the amount of effort required

• To create imbalance in the system

What is a counterweight?

• A weight applying an opposite force to balance the system

• A very heavy weight on the ground

• The load

Which are types of pulleys

• Wing, fries

• load, weight

• fixed, movable

• effort, force

How do you calculate mechanical advantage?

• MA =load/effort (output/input)

• MA = radius/radius

• MA = Height/width

• MA = load * effort

Which one is a cam

• 
• 

What is operated by a cam in the car engine?

• Fuel Valves

• Pistons

• Wheels