Question

The bob of a simple pendulum of length 1 m has mass 100g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the string at this moment. Take g=9.8m/sec2

Answer 1

At lowest point, two forces are acting on the bob

a) Tension in string upwards

b) mg downwards.

As it is moving along circular path hence

T−mg=mv2rT−mg=mv2r

=> T=mg+mv2rT=mg+mv2r

Given mm = 100g = 0.1 Kg, vv= 1.4 m/s, rr= ll= 1 m, g=10m/s2g=10m/s2

Hence T = 1.196 N


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Answer 2

Answer:

Explanation:

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