Question

If you pick a mass of 14.4 kg from the ground up to 1.26 m above the ground and it takes 1.10 s to do so, how much power is expended?

Answer 1

We will determine the power as follows:

We know that work is force times distance and power is work over time, so we will have that:

$\begin{gathered} P=\frac{(14.4kg)(9.8m/s^2)(1.26m)}{1.10s}\Rightarrow P=161.6465455...W \\ \Rightarrow P\approx161.65W \end{gathered}$

So, the power is approximately 161.65 Watts.