Unit 3 Study Guide 23-24

Match the following

• motion

• change in velocity

• speed

• distance divided by time

• velocity

• change in position over time

• acceleration

• displacement over time in a specific direction

Tags

NGSS.MS-PS3-1

Describe the motion of the box

• The box will move 75 N to the right, because the forces are unbalanced.

• The box will not move because the forces acting on the box are balanced

• The box will move 75 N to the left, because the forces are unbalanced.

• The box will move 125 N to the right, because the forces are unbalanced.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Match the following as examples of speed, velocity, acceleration or none.

• example of velocity

• A car drives 55 miles per hour

• example of speed

• The skateboarder sped up as he raced down the hill

• not an example of speed, velocity or acceleration

• Noah drove 8 miles south

• example of acceleration

• The bowling ball rolled 20 m/ to the left

Tags

NGSS.MS-PS3-1

Calculate the speed of this object (S=d/t): The bike traveled 500 meters in 6 seconds

Calculate the speed of this object (S=d/t): The car traveled 152 miles in 3 hours.

What is the difference between speed and velocity?

• Speed tells how fast something is moving, Velocity does not.

• Speed is velocity in a certain direction, Velocity is just how fast something is going

• To determine speed you need distance and time. To determine velocity you need distance, time and direction.

• Speed tells how quickly an object is traveling, Velocity tells how slowly an object is traveling

Tags

NGSS.MS-PS3-1

Where does this distance time graph show an object moving at a constant speed?

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS3-1

Where does this distance/ time graph show an object that is stopped?

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS3-1

Use the velocity/ time graph to describe what is happening at each point.

• D

• Slowing down

• B

• Speeding up quickly

• C

• Stopped

• A

• Speeding up slowly

• none of these

• Moving at a constant speed

Tags

NGSS.MS-PS3-1

When Eli rolls a baseball in a straight path on the field, why does it eventually stop moving?

• The ball will never stop rolling

• It will not stop until a catcher’s mitt stops it.

• The friction of the grass and dirt will cause the ball to stop rolling.

• Gravity and wind resistance push down on the ball, causing it to stop.

Tags

NGSS.MS-PS2-2