Question

The speed-time graph below shows a non-stop service of the Really Slow train travelling from Bangkok to Chiang Mai.

Find;
a) the time to accelerate to a constant speed?
b) the constant speed of the train?
c) the acceleration of the train at the start of the journey?

Leave answers to nearest whole number where necessary.

Answer 1

1. 2hours
2. 70 km/hr
3. $acc = \tan( \theta) = 70 \div 2 = 35kmhr {}^{ - 2}$

hope it helps

Answer 2

Answer:

a) 2 hours

b) 70 km/h

c) 70/2 = 35 km/h

Explanation:

a) As you can see, on the graph, the straight line is starting at 2 which means that the time to accelerate to a constant speed was 2 hours.

b) On the graph, the straight line/ the constant speed was 70 km/h.

c) To find the acceleration of the train at the start of the journey, we have to divide the constant speed of the train with the time to accelerate to a constant speed.

=> The constant speed of the train/ The time to accelerate to a constant speed

=> 70/2

=> 35 km/h

I hope it was helpful. <3