Simple Machines 2

Simple machines change size and direction of 

• Force 
• Simple
• Wheel and Axle

The part of a lever around which it moves is called the ---

• Inclined Plane 
• Elbow
• Fulcrum 

Less (------) is needed to move an object from one height to another using an inclined plane than is needed to lift the object.

• Motive 
• Distance 
• Force 

------ occurs when a force is applied to an object and the object is moved over a distance in the same direction in which the force is applied. 

• Energy
• Work 
• Force 
• Distance 

What is the unit used to measure work?

• Joule
• Watt
• Newton
• Pascal

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

Calculate the work done on a 12 N backpack that is lifted 2 m. (W=Fd)

• 24 J
• 0 J
• 6 J
• 2400 J

The unit for Force

• Newton (N)
• Joule (J)
• Second (s)
• Watt (W)

What is the formula for work?

• mass x gravity x height
• force x distance
• distance/time
• 1/2 x mass x velocity²

Which simple machines are found on a hammer?

• lever only
• wedge and plane
• axle and lever
• screw and pulley