Question

Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride.Part AIf a boat and its riders have a mass of 800 kg and the boat drifts in at 1.4 m/s how much work does Sam do to stop it?

Answer 1

Given data

*The given mass is m = 800 kg

*The given speed is v = 1.4 m/s

The formula for the work done by the Sam to stop it is given as

$W=\frac{1}{2}mv^2$

Substitute the known values in the above expression as

$\begin{gathered} W=\frac{1}{2}(800)(1.4)^2 \\ =784\text{ J} \end{gathered}$

Hence, the work done by the Sam to stop it is W = 724 J