Forces and Motion Review #3

Speed is the ratio of the distance an object moves to

• the amount of time needed to travel the distance.
• the direction the object moves.
• the displacement of the object.
• the motion of the object.

The slope of a line on a distance-time graph is

• distance.
• time.
• speed.
• displacement.

A horizontal line on a distance-time graph means the object is

• moving at a constant speed.
  
• moving faster.
• slowing down.
• at rest.

Vector addition is used when motion involves

• more than one direction
• more than one velocity
• more than one speed
• all of the above

The rate at which velocity changes is called

• speed
• vectors
• acceleration
• motion

Objects in free fall near the surface of the Earth experience

• constant speed.
  
• constant velocity.
  
• constant acceleration.
  
• constant distance.
  

The slope of a speed-time graph indicates

• direction
• acceleration
• velocity
• speed

An object that is accelerating may be

• slowing down
• gaining speed
• changing direction
• all of the above

When an unbalanced force acts on an object,

• the object’s motion does not change.
  
• the object accelerates.
  
• the weight of the object decreases.
  
• the inertia of the object increases.the inertia of the object increases.
  

Tags

NGSS.MS-PS2-2

When a pair of balanced forces acts on an object, the net force that results is

• greater in size than both forces combined.
  
• greater in size than one of the forces.
  
• equal in size to one of the forces.
  
• equal to zero.