Physics 5054 · Question 1[8 marks]
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.