Question
A car of mass 1000 kg accelerates uniformly from rest to a velocity of 54 km/h in 5 seconds calculate 1) its acceleration 2) its gain in k.e 3) average power of the engine during this period . neglect friction
Answers
Damon
54 km/h * (1 h/3600 s)*(1000 m/km)
= 15 m/s
15 m/s / 5 s = 3 m/s^2
(1/2) m v^2 Joules
(1/2) m v^2 Joules/15seconds ---> Watts
= 15 m/s
15 m/s / 5 s = 3 m/s^2
(1/2) m v^2 Joules
(1/2) m v^2 Joules/15seconds ---> Watts