Answer:
4982.8 W
Explanation:
Given the mass of the car = 1430 kg
initial speed = 7.5m/sec
final speed = 11.0 m/sec
time = 9.30sec
Assuming constant accelration a We know that
v=u+at
11=7.5+9.3a
a=0.376 [tex]m/sec^2[/tex]
We know that F=ma
F= [tex]1430*0.376 = 538.2N[/tex]
We know that [tex]v^2-u^2=2as[/tex]
[tex]11^2-7.5^2=2*0.376*s[/tex]
s= 86.10m
We know that work(W)=[tex]F*s[/tex]
W= [tex]538.2*86.10[/tex] = 46339.02J = 46.34KJ
We know that power= [tex]\frac{work}{time}[/tex] = [tex]\frac{46.34}{9.3}=4.982[/tex] KW
