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A cart is moving down a smooth incline o...

A cart is moving down a smooth incline of inclination `(theta)`. What is the time period of a bob hanging from roof of cart with a light string?

A

a.`2pi (sqrt(1/(g cos(theta))))`

B

b. `2pi (sqrt(l/g))`

C

c. `2pi (sqrt(1/(g sin(theta))))`

D

d. `2pi (sqrt(1/(g cot(theta))))`

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