Law of Inertia Review

Which term describes the natural tendency of an object to resist changes in its motion?

• Friction

• Inertia

• Air Resistance

• Constant Velocity

What is an unbalanced force?

• A force that is always equal in all directions

• A net force that changes an object's motion

• A force that keeps an object at rest

• A force that only acts on stationary objects

Tags

NGSS.MS-PS2-2

A skydiver slows down after opening a parachute. Which force is primarily responsible for this?

• Friction

• Gravity

• Air Resistance (drag)

• Balanced Force

Which statement best describes constant velocity?

• Motion that changes speed frequently

• Motion that continues in a line at the same speed

• Motion that is always at rest

• Motion that is always accelerating

What is required for an object's motion to change?

• An outside force

• The object's color

• The object's temperature

• The object's shape

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NGSS.MS-PS2-2

NGSS.MS-PS2-5

Which of the following makes it harder to start, stop, or change the motion of an object?

• More mass

• Less mass

• Lower temperature

• Higher speed

Tags

NGSS.MS-PS2-2

What are common unbalanced forces in real life that affect motion?

• Friction and air resistance

• Gravity and magnetism

• Light and sound

• Heat and electricity

Tags

NGSS.MS-PS2-2

What causes a hockey puck to eventually stop sliding across ice?

• Friction or another player stopping it

• Gravity pulling it down

• The puck running out of energy

• The ice melting

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

In outer space, why do satellites keep orbiting Earth without slowing down?

• There is no air resistance to slow them down

• They have unlimited fuel

• Gravity does not affect them

• They are pushed by solar wind

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NGSS.MS-ESS1-2

NGSS.MS-PS2-4

A car moving forward will keep moving even if the engine is turned off. What will eventually slow it down?

• Friction, air resistance, or brakes

• The weight of the car

• The color of the car

• The speedometer

Tags

NGSS.MS-PS2-2