Year 10 Textbook

St. Mary’s College Science Department
Year 10 Science
Now try these questions…
1. A train has an acceleration of 3 m/s/s. What does this tell you about its
velocity?
2. A bus has a deceleration of 2 m/s/s. What does this tell you about the
velocity of the bus?
3. A car takes 8 seconds to increase its velocity from 3 m/s to 30 m/s.
What is its acceleration?
4. A motorbike, travelling at 25 m/s takes 5 seconds to come to a halt.
What is its deceleration?
5. An aeroplane has an acceleration of 4 m/s/s. What is its velocity after 5
seconds if it starts from rest?
Homework 2
1. A car starts at a speed of 20 m/s and accelerates up to a speed of 30
m/s. It takes 5 seconds to do this. What is its acceleration?
2. A bus which is travelling at a speed of 25 m/s makes an emergency stop
and comes to a halt in 3 seconds. What is its deceleration?
Extension Homework
1. Carry out research on how the following things help protect you in the
event of a car crash…
a. A seatbelt
b. An air-bag
In particular find out how these things affect the deceleration of the
driver or passenger.
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