Review of Forces and Energy, Work, and Power

According to the Law of Conservation of Energy, energy cannot be _________ or ____________.

• destroyed, destroyed

• created, saved

• created, destroyed

Tags

NGSS.MS-PS3-5

People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?

• mechanical to electrical

• mechanical to thermal

• chemical to sound

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which of the following mechanical energy to electrical energy?

• solar calculator

• windmill

• firecracker

the transfer of energy through motion.

• machine

• force

• work

• distance

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

the force saved by using a machine

• distance

• Newtons

• inclined plane

• mechanical advantage

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

a triangular piece of metal, wood, rubber, etc. It is used to split or open things.

• lever

• wheel

• compound machine

• wedge

a bar used for lifting or opening.

• wedge

• inclined plane

• axle

• lever

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

a simple machine in which a wheel or set of wheels is used with a rope or chain to lift heavy objects.

• wheel

• rope

• pulley

• screw

The force that resists motion between two objects that are touching is:

• wheel

• gravity

• friction

• heat

What is the equation for work?

• force X distance = work

• distance X work = force

• work + distance + force = simple machine

• energy / distance = force