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

Respuesta :

Answer:

30.16 hp

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

[tex]Average\ power\ =\ \frac{0.5*m*v^2\ }{t}[/tex]

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

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

[tex]Average \ power\ =\ \frac{0.5*1000*15*15}{5} \\Average \ power\ =\ 22,500\ w\\Average \ power\ =\frac{22,500}{746} \\Average \ power\ =30.16\ hp[/tex]

To convert w to hp we divide by 746

Therefore 30.16 hp is the answer.