PHYSICS 5054 · STRUCTURED PRACTICE
1
A car accelerates from rest to 20 m s⁻¹ in 10 s, travels at constant speed 20 m s⁻¹ for 20 s, and decelerates uniformly to rest in 10 s.
(a)
[2]Calculate the acceleration of the car during the first 10 s.
(b)
[2]Calculate the deceleration during the final 10 s.
(c)
[3]Calculate the total distance travelled by the car during the 40 s motion.
(d)
[1]Calculate the average speed of the car for the entire journey.
Total: 8 marks