RWS Sem 2 Review

An oven mitt, wooden spoon, and plastic plate are all electrical and heat

• insulators

• conductors

• none of these

The simple machine pictured is a(n)

• pulley

• screw

• lever

• wedge

A compound machine

• contains 2 or more simple machines

• is always a 1st class lever

• has an efficiency over 100%

• always has a wedge

Tags

NGSS.MS-PS2-1

The lever pictured is a ___ class lever

• 1st

• 2nd

• 3rd

• fulcrum

The speed of a dinosaur running 45 meters in 5 seconds is

• 9 m/s

• 7 m/s

• 225 m/s

• 45 m/s

Tags

NGSS.MS-PS3-1

The net force below is

• 2 N -->

• <-- 2 N

• 38 N -->

• <-- 18 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The force exerted on the box would be

• 75 N

• 33.3 N

• 50 N

• 235 N

Tags

NGSS.MS-PS2-2

A water balloon waiting to be released and dropped on a person's head would have lots of

• Potential energy

• Chemical energy

• Kinetic energy

• Nuclear energy

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The electrons flowing in only one direction is called

• alternating current

• direct current

• longitudinal current

• elastic current

A resistance to a change in motion is called

• velocity

• force

• speed

• inertia