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frutty [35]
3 years ago
15

A laser pointer is placed on a platform that rotates at a rate of 60 revolutions per minute. The beam hits a wall 10 m away, pro

ducing a dot of light that moves horizontally along the wall. Let θθ be the angle between the beam and the line through the searchlight perpendicular to the wall.
Physics
1 answer:
Sever21 [200]3 years ago
7 0

Answer:

v = 20\pi sec^2\theta

Explanation:

As we know that the angle made with the vertical is given so we have

tan\theta = \frac{x}{10}

so we have

x = 10 tan\theta

now differentiate both sides with time

v = \frac{dx}{dt} = 10 sec^2\theta \frac{d\theta}{dt}

v = 10 \omega sec^2\theta

now we know that

\omega = 2\pi f

\omega = 2\pi (\frac{60}{60})

\omega = 2\pi

now we have

v = 10(2\pi) sec^2\theta

v = 20\pi sec^2\theta

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After 56 days the displacement of snail is 112 feet.

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