Question

Calculate the power output of a 1.5 g fly as it walks straight up a windowpane at 2.4 cm/s .

Express your answer using two significant figures. (Watts)

Answer 1

Answer:

Power output, P = 0.35 watts

Explanation:

It is given that,

Mass of the fly, m = 1.5 g = 0.0015 kg

Speed of the fly, v = 2.4 cm/s = 0.024 m/s

We have to find the power output of the fly. Power output is given by :

$P=\dfrac{W}{t}$

And W = F.d

d = distance traveled

$P=\dfrac{F.d}{t}$

Since, v = d /t

So, P = F . v

$P=mg\times v$

$P=0.0015\ kg\times 9.8\ m/s^2\times 0.024\ m/s$

P = 0.00035 watts

or P = 0.35 watts

Hence, this is the required solution.

Answer 2

Value of power output generated by the fly, when it walks straight up a windowpane is 0.35 Watts.

What is electric power?

Electric power is the power or energy transmitted by a electric source or circuit per unit time. It can be given as,

$P=\dfrac{W}{t}$

Here, (w) is the work done and (t) is time taken. As the work done on a body is the product of force and distance of body, Therefore,

$P=\dfrac{Fd}{t}$

Here, (F) is the force and (d) is distance. As the ratio of distance to the time is the velocity of the body. Thus,

$P=\dfrac{Fv}{t}$

The mass of the fly is 1.5 gram and the speed of the fly is 2.4 cm/s.

The power output of the fly as it walks straight up a windowpane at if find out using the above formula as,

$P=0.0015\times9.8\times0.024\\P=0.00035\rm kW\\P=0.35\rm W$

Thus, value of power output generated by the fly, when it walks straight up a windowpane is 0.35 Watts.

Learn more about electric power here;

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