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3 years ago

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

Physics

2 answers:

MariettaO [177]3 years ago

8 0

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

Novosadov [1.4K]3 years ago

5 0

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

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

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

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

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Given that,

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n = 11.93 electrons

n = 12 electrons

Hence, 12 electrons produce the charge on one of the objects.

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