Question

a 1000 kg car accelerates from 0 to 15 m/s in 5.0 s with negligible friction and air resistance. what is the average power delivered by the engine

Answer 1

30.16 hp

Step-by-step explanation:

Given :

m= 1000 kg

v=15 m/s

t=5.0 s

The average power delivered by the engine can be determined by using the given formula

`Average\ power\ =\ (0.5*m*v^2\ )/(t)`

where m=,mass, v=velocity and t=time

Now putting the value of m,v and t in the previous equation we get

`Average \ power\ =\ (0.5*1000*15*15)/(5) \\Average \ power\ =\ 22,500\ w\\Average \ power\ =(22,500)/(746) \\Average \ power\ =30.16\ hp`

To convert w to hp we divide by 746

Therefore 30.16 hp is the answer.