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A simple pendulum of length 1 m with a b...

A simple pendulum of length 1 m with a bob of mass m swings with an angular amplitude `30^(@)`. Then (g=`9.8m//s^(2)`

A

time period of pendulum is 2 sec

B

tension in the string is greater than `mg cos15^(@)` at angular displacement `15^(@)`

C

rate of change of speed at an angular displacement `15^(@) " is " g sin 15^(@)`

D

tension in the string is `mg cos 15^(@)` at angular displacement `15^(@)`

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The correct Answer is:
B, C
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