S8P3 Force & Motion Unit Test

A runner is in a race. She runs 400m around a track, stopping and starting at the same place. What is her displacement?

• 400m

• 0m

• 200m

• 800m

A moving car rolls up to a traffic light. Just as the car is about to slow down to stop the light turns green. The car begins going faster and faster. What just occurred?

• The car is at rest.

• The car accelerated.

• The car used a simple machine.

• The car changed direction.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is inertia?

• The tendency of an object to resist changes in motion
• The force that keeps an object moving
• The speed of a moving object
• The acceleration due to gravity

What is a force?

• A push or pull on an object
• The speed of an object
• The energy stored in an object
• The acceleration of an object

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

What are balanced forces?

• Forces that cause motion
• Forces that are equal and opposite, causing no motion
• Forces that slow down an object
• Forces that increase velocity

What type of force does Earth exert on a ball thrown into the air?

• Magnetic force
• Gravitational force
• Friction
• Inertia

Tags

NGSS.MS-PS2-4

How is velocity different from speed?

• Velocity includes direction, speed does not
• Speed includes direction, velocity does not
• They are the same
• Speed is always greater than velocity

What is acceleration?

• The rate of change of velocity
• The distance an object moves
• The speed of an object
• The force acting on an object

Tags

NGSS.MS-PS2-2

What causes a leaf and an acorn to fall at different rates?

• One of them is buoyant

• They have different densities

• Friction from air resistance

• One is heavier

What are the action and reaction forces when you walk?

• You push on the ground, and the ground pushes back
• You push on the ground, and the ground pulls you down
• The air pushes on you
• Your body pulls forward