2A.Imani starts her bicycle from rest and accelerates uniformly to a speed of 40 km/h in 6 minutes. She maintains this speed for another 5 minutes, then applies the brakes and decelerates uniformly to rest in 3 minutes. (i) Select a velocity-time graph to show the different segments of Imani's journey. (ii) Calculate the acceleration in km/h² during the first 6 minutes of the journey.
2A.Imani starts her bicycle from rest and accelerates uniformly to a speed of 40 km/h in 6 minutes. She maintains this speed for another 5 minutes, then applies the brakes and decelerates uniformly to rest in 3 minutes. (i) Select a velocity-time graph to show the different segments of Imani's journey. (ii) Calculate the acceleration in km/h² during the first 6 minutes of the journey.
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Solve ii part only in 10 min pls plz plz
Transcribed Image Text:2A. Imani starts her bicycle from rest and accelerates uniformly to a speed of 40 km/h in 6 minutes.
She maintains this speed for another 5 minutes, then applies the brakes and decelerates
uniformly to rest in 3 minutes.
(1) Select a velocity-time graph to show the different segments of Imani's journey.
(ii) Calculate the acceleration in km/h² during the first 6 minutes of the journey.
(iii) Calculate the deceleration in km/h² for the last 3 minutes of the journey.
(iv) Calculate the total distance covered in km for the entire journey.
Calculate the average speed for the entire journey in km/h to the nearest whole number.
(1)
(ii)
(iv)
40
6
12
15
mins
km/h²
km
Enter your answer
40
km/h
(iii)
(1)
6
11
14
mins
40
km/h²
km/h
15
1
7
Tab
18
mins
2
8
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