Speed, Distance, Velocity, and Acceleration

Which is an example of speed?

• A car driving 55 miles per hour south.

• A bicyclist traveling 10 meters per hour toward the next town.

• A roller coaster is traveling 10 meters per second.

• A rocket blasting off at 2,500 meters per second toward space.

Tags

NGSS.MS-PS3-1

Acceleration is a speeding up, slowing down or a change in direction. Is the following acceleration and if so, which one?

A swimmer has 10 meters left in the race and he is neck-in-neck with his competitor. He has a surge of adrenaline and pulls ahead to win.

• Yes, this is acceleration since the swimmer starts to speed up to pull ahead.

• Yes, this is acceleration since the swimmer uses the wall to change directions.

• No, this is not acceleration since there is no speeding up, slowing down, or change in direction.

Tags

NGSS.MS-PS3-5

___ refers to how fast an object is moving.

• Speed

• Velocity

• Acceleration

• Motion

Tags

NGSS.MS-PS3-1

Which two factors does speed depend on?

• distance and direction

• direction and time

• distance and time

• distance, time and direction

Tags

NGSS.MS-PS3-1

Which is an example of velocity?

• A car driving 55 miles per hour south.

• A bicyclist traveling 10 meters per hour.

• A roller coaster is traveling 10 meters per second.

• A rocket blasting off at 2,500 meters per second.

Which is NOT an example of Acceleration?

• An object speeds up

• An object slows down

• An object changes direction

• An object is in constant motion.

Speed or Velocity?:

A turtle is crawling 34 cm/min.

• Speed

• Velocity

• Neither

• Both

Speed or Velocity?:

A train is travelling North 220 km/hr

• Speed

• Velocity

• Neither

• Both

Tags

NGSS.MS-PS3-1

Acceleration is a speeding up, slowing down or a change in direction. Is the following acceleration and if so, which one?

A dancer is warming up. She turns on music with a good beat and does 10 pirouettes in a row perfectly on the beat. (pirouette is a body spin in ballet)

• Yes, this is acceleration since the dancers is going a certain speed.

• Yes, this is acceleration since the dancer is changing direction when she spins.

• No, this is not acceleration since there is no speeding up, slowing down, or change in direction.

You are standing at the bus stop and not moving at all. Since you are not moving, your acceleration would be 0 (zero). Support with how you know.

• True since you are not speeding up, slowing down or changing directions.

• True since you are traveling no distance in a certain amount of time.

• False since you are speeding up, slowing down and/or changing directions.

• False since you were going to get on a moving bus.