1.

Find in degrees the angle through which a pendulum swings if its lengthis `50c m`and the tip describes an arc of length `10c m`.

Answer» Here, length of arc, `l = 10cm`
Length of pendulam, `r = 50cm`
We know, `rtheta = l`
`=>50theta = 10`
`=>theta = 1/5 radian`
`=>theta = 1/5(360/(2pi))^@ = (36/pi)^@`


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