Distance in uniformly variable motion
Answers are for parents and teachers.
1
From rest with a = 6 m/s² for 2 s: distance (m)?
12
2
υ₀ = 5 m/s, a = 2 m/s², t = 4 s. Distance (m)?
36
3
From rest with a = 1 m/s², find the distances at 1, 2, 3 s and compare.
0.5 m; 2 m; 4.5 m — ratio 1 : 4 : 9.
4
A bicycle at υ₀ = 8 m/s with a = −1 m/s² moves for 4 s. Distance (m)?
24
5
Why does braking distance grow fast as speed increases? (hint: stopping time t = υ₀/a, distance s = υ₀t/2)
If the speed doubles, both the stopping time and the average speed double, so the braking distance becomes 4 times longer.