Question

In a training session, a racing cyclist's journey is in three stages.
Stage 1 He accelerates uniformly from rest to 12m/s in 20 s.
Stage 2 He cycles at 12m/s for a distance of 4800m.
Stage 3 He decelerates uniformly to rest.
The whole journey takes 500s,
(a) Calculate the time taken for stage 2.
time =
s [2]
(b) On the grid of Fig. 2.1. draw a speed/ume graph of the cyclist's ride.
12
speed/
mis
10
8
6
4
2
o
100
200
300
400
500
time/s​

Answer 1

Pythagoras' theorem states that for all right-angled triangles, 'The square on the hypotenuse is equal to the sum of the squares on the other two sides'. The hypotenuse is the longest side and it's always opposite the right angle. In this triangle \ (a^2 = b^2 + c^2\) and angle \ (A\) is a right angle.