Force and Motion End of Unit

An object in motion tends to stay in motion unless an ___ force acts on it.

• unbalanced
• balanced

Tags

NGSS.MS-PS2-2

Because of inertia, a moving object will keep ________ unless acted on by an unbalanced force.

• at rest

• moving

• in one spot

• inertia

What kind(s) of objects have inertia?

• all objects with mass
• only objects at rest
• only objects in motion
• only objects whose motion is being changed

Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

Tags

NGSS.HS-PS2-1

What happens when unbalanced forces act on an object at rest?

• the object remains at rest

• the object accelerates in an unpredictable direction

• the object begins accelerates in the direction of the net force

• the object begins moving opposite to the direction of net force

Tags

NGSS.HS-PS2-1

A 20 kg bike accelerates at 10 m/s². what was the force

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

Tags

NGSS.HS-PS2-1

What is the acceleration of an object traveling at a constant velocity?

• 10 m/s²
• 0 m/s²
• 250 m/s²
• 20 m/s²

Tags

NGSS.HS-PS2-1

What are the appropriate units to describe acceleration?

• m/s
• m/s²
• cm
• there are no units associated with acceleration

Tags

NGSS.HS-PS2-1

Acceleration changes and object's...

• speed, direction or both
• speed, gravity or both
• gravity, direction or both
• inertia, speed or both

Tags

NGSS.HS-PS2-1

Newton's Third Law States...

• Objects in motion stay in motion and objects at rest stay at rest
• Force is equal to mass times acceleration
• For each action there is an equal and opposite reaction

Tags

NGSS.MS-PS2-1