FIVE FACTS ON FIVE FACTS ON ACCELERATIONACCELERATION

• If an object is speeding up we say that it is accelerating.

• If an object is slowing down we say that it is decelerating.

• Acceleration tells us how many metres per second its speed increases by every second.

• Acceleration = change in velocity time• Acceleration is measured in metres per

second squared (m/s2).

QUESTION 1QUESTION 1• A carrot’s speed increases from 5 m/s to 20

m/s in a time of 3 seconds. What is the carrot’s acceleration?

• Acceleration = change in velocity time• Acceleration = 15 / 3• Acceleration = 5 m/s2

QUESTION 2QUESTION 2• A mouse slows down from 70 m/s to 30 m/s in 4

seconds. What is the deceleration of the mouse?

• Acceleration = change in velocity time• Acceleration = - 40 / 4• Acceleration = - 10 m/s2

QUESTION 3QUESTION 3A small cauliflower falls in a tragic manner. If the acceleration due to gravity is 10 m/s2, what is the speed of Mr. Cauliflower after 4.5 seconds?

•Change in velocity = acceleration x time

•Change in velocity = 10 x 4.5

•Change in velocity = 45 m/s

ACCELERATIOACCELERATION QUESTIONS!N QUESTIONS!

1. A fly called Gerald accelerates from 12 m/s to 18 m/s in 0.25 seconds, calculate his acceleration.

2. A car accelerates from rest to a velocity of 22 m/s in a time of 5 seconds. What is the acceleration of the car?

3. A meteorite decelerates from 20000 m/s to 0 m/s in 0.1 seconds. Calculate the deceleration of the meteorite.

4. If a formula one car accelerated at 20 m/s2, how fast would it be moving after 6 seconds?

5. If a space craft travelling at 3500 m/s accelerates at 3000 m/s2 for 0.5 seconds, what is it’s new speed?