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Lynna [10]
3 years ago
11

A pulley can be thought of as an inclined plane wrapped around a cylinder

Physics
1 answer:
SashulF [63]3 years ago
8 0
Yes, and the use of that is to transfer energy so you don't have to put in as much force.
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Starting from rest, a wheel with constant angular acceleration turns through an angle of 25 rad in a time t. Through what angle
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Answer:

After time 2t, the wheel will turn through an angle of 100 rad.

Explanation:

Given;

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The constant angular acceleration is calculated as;

\theta = ut + \frac{1}{2}at^2\\\\\theta = 0 + \frac{1}{2}at^2\\\\2\theta = at^2\\\\a = \frac{2\theta }{t^2} \\\\a = \frac{2\ \times \ 25 }{t^2}\\\\a = \frac{50}{t^2} \\\\when \ t = 2t\\\\\theta = \frac{1}{2}at^2\\\\\theta = \frac{1}{2}(\frac{50}{t^2})(2t)^2\\\\\theta =\frac{1}{2}(\frac{50}{t^2})(4t^2)\\\\\theta = 100 \ rad

Therefore, after time 2t, the wheel will turn through an angle of 100 rad.

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