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63. The bob of a pendulum at rest is given a sharp himpart a horizontal velocity v10 gl, whereof the pendulum. Find the tension in the string when(a) the string is horizontal, (b) the bob is at its highestpoint and (c) the string makes an angle of 60 with theupward vertical.l is the length59 |
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Answer» Why, mgl(1+cos 60) |
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