Answer to Question #151280 in Physics for Asante Smith

Question

A car starting from rest with uniform acceleration reaches a velocity of 10 m/s in 10 s and travels with this velocity for 20 s. It then decelerates steadily and comes to a rest 50 s after starting.

A) Plot a velocity time graph for the car's journey. [6 marks]

B) State the car's maximum speed in km/h. [2 marks]

C) Find (by any method),

i) the car's instantaneous velocity at t = 40s [2 marks]

ii) the acceleration during the first 10s of the journey [2 marks]

iii) the distance travelled at constant velocity [2 marks]

iv) the deceleration during the final leg [2 marks]

v) the total distance travelled [2 marks]

vi) the average velocity for the entire journey

Answer 1

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