Speed, Velocity, and Acceleration

___ refers to how fast an object is moving.

• Speed

• Velocity

• Acceleration

• Motion

Which two factors does speed depend on?

• distance and direction

• direction and time

• distance and time

• distance, time and direction

What two factors does velocity depend on?

• speed and direction

• distance and time

• speed and time

• distance and direction

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.

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

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.

True or False: 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.

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