Energy and Simple Machines

A wheel is a modification of a(n)

• screw
• lever
• inclined plane
• wedge

Which of the following is not an example of work?

• an ice hockey puck laying on an ice rink
• ship movement that causes ripples in the water
• a man pushing a heavy box across the floor
• a magnet repelling a compass needle

Which of the following is not an inclined plane?

• wrench
• axe
• chisel
• ramp

In a first-class lever, ...

• the effort is located between the fulcrum and the resistance
• the fulcrum is located at the end of the lever
• the resistance is located between the fulcrum and the effort
• the fulcrum is located between the effort and the resistance

A device in the shape of two inclined planes placed bottom to bottom is called a(n) ...

• incline
• wedge
• wheel and axle
• block and tackle

First- and second-class levers amplify effort or force. Third-class levers amplify ...

• friction
• distance
• pitch
• power

A mechanical advantage of <1 indicates...

• you are unable to determine just by the number value
• you are at a disadvantage when you use the machine
• the whole system is in balance
• you are at an advantage when you use the machine

Tags

NGSS.MS-ETS1-1

"The total kinetic energies of all particles in an object" describes what kind of energy?

• radiant
• thermal
• electrical
• magnetic

A mechanical advantage of 1 indicates ...

• you are at an advantage when using the machine
• you are unable to determine just by the number value
• you are at a disadvantage when using the mcahine
• the system is in balance

Which has kinetic energy?

• a compressed spring
• a book on the bookshelf
• an avalanche
• a case of dynamite