a block is attached to the end of a string and initially moves at a constant speed in a horizontal circle of constant radius, as shown. the radius is then increased slowly while the speed remains the same. which of the following graphs best represents the force exerted on the block by the string as a function of the radius?

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RupaBera RupaBera · Answer 1 · 2022-12-17T19:46:07+01:00

The block can initially follow a circle with a radius of r that is less than L thanks to the circumferential speed v and length of the string L.

string's angle below the horizon are :

cosA = r/L

and the angle is such that string tension fights against vertical gravity and provides the necessary horizontal centripetal acceleration

v2/r.

Keeping the circumferential speed v constant while allowing the string length to expand to L' calls for the same centripetal acceleration, or

v2/r

but the string angle B is now

cosB = r/L',

which is smaller than cosA. Less cosine indicates that angle B is farther away from 0 (the horizon) than angle A, causing the rope to hang lower.

To know more about centripetal acceleration visit:-

https://brainly.com/question/14465119

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