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4 years ago

A small 17 kilogram canoe is floating downriver at a speed of 3 m/s. What is the canoe's kinetic energy?

2 answers:

7 0

KE=1/2mv^2

So from the given information me can plug in the values and find the KE or Kinetic Energy for the canoe;

KE=1/2(17kg)(3m/s)^2
KE=8.5kg*9m^2s^2= 76.5J of Kinetic Energy

Hope this helps, any questions please just ask. Thank you.

mina [271]4 years ago

7 0

Kinetic energy = (1/2) · (mass) · (speed)²

A physics student on the river bank watching the canoe pass by

will say that it has 76.5 joules of kinetic energy, while another

student floating beside it in another boat will say that it has no

kinetic energy at all. Both students are correct.

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Explain how land breeze and sea breezes occur?

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2m/s

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3 years ago

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Mars2501 [29]

Answer:

The answers are located in each of the explanations showed below

Explanation:

(i) Surface Tension: The tensile force that causes this tension acts parallel to the surface and is due to the forces of attraction between the molecules of the liquid. The magnitude of this force per unit of length is called surface tension.

σ = F/l [N/m]

where:

F = force [N]

l = length [m]

σ = Surface Tension [N/m]

(ii) Frequency is the number of repetitions per unit of time of any periodic event.

f = 1/T [1/s] or [s^-1] or [Hz]

where:

T = period [s] or [seconds]

f = frecuency [Hz] or [hertz]

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a = accelertion [m/s^2]

s = displacement [m]

$[\frac{m}{s} ]^{2} =[\frac{m}{s} ]^{2} + 2* [\frac{m}{s^{2} } ]*[m]\\$

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$[\frac{m^2}{s^2} ]$

b) To find the velocity we must derivate the function X with respect to t because this derivate will give us the equation for the velocity, it means:

$v=\frac{dx}{dt} \\v = 0.75*2*t+5*t$

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iii) the average velocity is defined by the expresion v = x/t

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