A small 20-kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?
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
\(K.E=\frac{1}{2}\times 20kg\times (2m/s)^2\)
\(K.E=40kgm^2s^-{2}=40Joules\)
\((1kgm^2s^{-2}= 1Joule)\)