Acceleration
Answers are for parents and teachers.
1
A train raises its velocity from 5 m/s to 25 m/s in 10 s. Acceleration (m/s²)?
2
2
A bus brakes from 18 m/s to 6 m/s in 6 s. Its acceleration (m/s²)?
−2
3
A body accelerating at 4 m/s²: by how many m/s does its velocity increase in 3 s?
12
4
Give one example each of speeding-up and slowing-down motion you have observed.
For example: a bus starting off speeds up; a bus approaching a stop slows down.
5
Why must we wear a seat belt in a car?
Braking sharply gives a large acceleration and the belt keeps passengers from being thrown forward.