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iogann1982 [59]
3 years ago
10

20-kilogram canoe is floating downriver at 2 m/s. what’s the kinetic energy?

Physics
2 answers:
ziro4ka [17]3 years ago
6 0

Answer:

40J

Explanation:

Kinetic energy = 1/2 mv^2

Where m = mass and

v = velocity

Given mass = 20kg

v = 2m/s

K.E = 1/2 x 20 x2^2

= 1/2 x 20 x 2 x 2

= 80/2

= 40J

ryzh [129]3 years ago
3 0

To a physicist floating next to it in another canoe, its KE is zero.

To a physicist standing on the riverbank watching it go by, its KE is 40J.

They're both correct for their own reference frame.

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