A small 16 kilogram canoe is floating downriver at a speed of 3 m/s. What is the canoe's kinetic energy?

72 Joules.

Step-by-step explanation:

kinetic energy (K. E) is the energy possessed by a body in motion.

K. E = 1/2*mv²

where m is the mass and v is the velocity/speed of the body in motion.

K. E = 1/2*mv²

= 1/2 * 16 * 3²

= 1/2 * 16 * 9

= 72 Joules.