Answer:
See the answers below.
Explanation:
a) KEf, This term refers to the final kinetic energy i.e. when the velocity has reached 27 [m/s].
To calculate this energy we must use the following equation that relates velocity and mass to kinetic energy.
[tex]E_{kin}=\frac{1}{2} * m*v^{2}[/tex]
where:
m = mass = 2.2*10³[kg]
v = velocity = 27 [m/s]
[tex]E_{kin}=\frac{1}{2} *2.2*10^{3}*(27)^{2}\\E_{kin}=801900[J][/tex]
b)
Power is defined as the amount of energy or work done over a certain time, it can be calculated by means of the following equation.
[tex]P=E_{kin}/t[/tex]
where:
t = time = 2.4 [s]
P = Power [W]
Now replacing:
[tex]P=801900/2.4\\P=334125[W]\\Now in Hp\\334125[w]*\frac{1hp}{745w} \\= 448.5[hp][/tex]
