Objects in Motion

In  this image what direction would an arrow go to indicate the force of gravity on the snow plow? 

• left
• right
• down
• up

Force is defined as a 

• push or pull
• motion 
• energy
• velocity 

The location of an object in relation to another object or place is described as 

• friction 
• gravity 
• velocity 
• position 

Cars, bicycles, and people are all objects that can be in motion. What is true about motion? 

• an object in motion is accelerating 
• motion is the change in position of an object. 
• an object in motion has no speed but it does have velocity
• gravity and friction are responsible for all motion 

Sally is throwing a ball high into the air and then catching it. What force is responsible for the ball coming back to the ground?

• speed 
• friction
• gravity
• acceleration 

A roller coaster speeds up as it travels downhill and then slows as it enters a curve. Which statement best describes the motion of the roller coaster during this trip? 

• velocity changes, but acceleration remains constant
• the velocity of the roller coaster remains constant 
• the roller coaster accelerates throughout the trip 
• the speed of the roller coaster remains constant 

Jen is walking her dog at a constant rate. They keep a constant rate as they turn a corner. Why has their velocity changed?

• because their speed changed
• because their direction changed
• because their position changed 
• because their force changed

What changes as these children roll down the hill at a constant speed?

• velocity
• position
• acceleration
• speed 

The speed of an object in a particular direction is the definition of what? 

• friction 
• force
• motion
• velocity 

a measure of an objects change in position during a certain amount of time is _________? 

• motion 
• force 
• friction 
• speed