Exploring Energy and Simple Machines

Which of the following is a form of potential energy?

• Kinetic energy

• Thermal energy

• Chemical energy

• Sound energy

Tags

NGSS.MS-PS3-2

What type of simple machine is a seesaw?

• Pulley

• Lever

• Inclined plane

• Wheel and axle

Which energy transformation occurs in a battery-powered flashlight?

• Chemical to electrical to light

• Electrical to chemical to light

• Light to chemical to electrical

• Thermal to electrical to light

What is the mechanical advantage of a machine that requires 10 N of input force to lift a 50 N load?

• 0.2

• 5

• 10

• 50

Tags

NGSS.MS-PS2-2

Which formula represents the concept of work?

Tags

NGSS.HS-PS3-3

Which class of lever has the fulcrum positioned between the effort and the load?

• First-class lever

• Second-class lever

• Third-class lever

• Fourth-class lever

What type of simple machine is a flagpole?

• Lever

• Pulley

• Wedge

• Screw

Which of the following is an example of kinetic energy?

• A compressed spring

• A moving car

• A charged battery

• A book on a shelf

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the mechanical advantage of a pulley system with 4 supporting ropes?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-1

Which energy transformation occurs in a toaster?

• Electrical to thermal

• Thermal to electrical

• Chemical to thermal

• Light to electrical