Question

A small 17 kilogram canoe is floating downriver at a speed of 2 m/s. What is the

Answer 1

Hello!

The answer is:

Answer: 34

Units: Joules

$KE=34J$

Why?

The kinetic energy is the work needed to accelerate an object to a determined speed.

The kinetic energy can be calculated using the following equation:

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

Where,

m, is the mass of the object.

v, is the speed of the object.

So, we are given the information:

$mass=17kg\\\\v=\frac{2m}{s}$

Then, substituting and calculating we have:

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

$KE=\frac{1}{2}*17kg*(\frac{2m}{s})^{2}$

$KE=8.5kg*(\frac{4m^{2}}{s^{2}})$

$KE=34\frac{kg.m^{2}}{s^{2}}=34J$

Have a nice day!