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Sergio [31]
2 years ago
14

April does 1800 J of work to get a canoe moving from rest. April and the canoe have a mass of 70 kg. a. What is the kinetic ener

gy of April and the canoe after she does the work?
Physics
2 answers:
Katyanochek1 [597]2 years ago
5 0

E = (1/2)mv²

1800 = (1/2)(70)v²

Solving for v²

1800(2)/70 = v²

v² = 55.714

√v² = √55.714

v = ~7.46 m/s

Alex_Xolod [135]2 years ago
4 0

Answer:

Kinetic energy = 1800 J

Explanation:

As per work energy theorem we know that the total work done on the system is always equal to the change in kinetic energy of the system

So we can say it as

W_{net} = KE_f - KE_i

here we can say that initially it starts from the rest state so the initial kinetic energy is given as

KE_i = 0

now from above equation we can say

W_{net} = KE_f - 0

so final kinetic energy must be equal to net work done on it

kinetic energy = 1800 J

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