To solve for power you can use this formula:
[tex]p = \frac{mad}{t} [/tex]
Where: m = mass
a = acceleration
d = distance
t = time
Since the motion of the object is vertical, the acceleration of the object will be due to gravity. The acceleration due to gravity is 9.8 m /s^2.
So we can now solve for power:
[tex]p = \frac{(63kg)(9.8m/ s^{2} )(7m)}{5s}
[/tex]
P = 864.36 Watts
The question though is how much horsepower so we need to convert watts into horsepower.
864.36 watts to hp is 1.159 hp or 1.16 hp the answer is C.
