Question

A small 20-kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?

Answer 1

Ek=1/2mv^2 = (20)(1/2)(2x2) =40

Answer 2

Answer: 40 Joules

Explanation: Kinetic energy is the energy possessed by a body by virtue of its motion.

Kinetic energy depends on the mass and speed of the object.

$K.E=\frac{1}{2}\times mv^2$

m= mass of canoe = 20 kg

v= speed of canoe = 2 m/s

$K.E=\frac{1}{2}\times 20kg\times (2m/s)^2$

$K.E=40kgm^2s^-{2}=40Joules$

$(1kgm^2s^{-2}= 1Joule)$