Machines and Daily Life

Coal is an example of ________ energy.

• chemical

• solar

• electrical

• kinetic

Describe the energy conversion

• sound energy to kinetic energy

• potential energy to kinetic energy

• kinetic energy to sound energy

• chemical energy to sound energy

Force can ______ of an object.

• increase the speed

• decrease the speed

• change the direction

• none of the above

The gentler the incline plane, the

the force needed.

• same

• stronger

• more

• less

When the distance between the effort and the fulcrum is shorter than that between the load and the fulcrum, the lever _______.

• increases effort

• reduce effort

• moves

• stays balanced

The _______ the surface on which an object moves, the

less the friction.

• smoother

• brighter

• rougher

• warmer

Thomas is using a screwdriver to pry open a paint can,  The screwdriver is being used as

• a pulley
• an inclined plane
• a screw
• a lever

6. What kind of lever is this?

• First Class Lever
• Second Class Lever
• Third Class Lever

Which type of lever would be in this image?

• First Class Lever
• Second Class Lever
• Third Class Lever

A lever is used to raised a mass with a weight of 12 Newtons using only 4 Newtons of force. How many times does the lever multiply the force?

• 12

• 4

• 3

• 32