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**mat** q1)the period (T) of a pendulum swing is the time taken in seconds for the pendulum to complete one swing. The period is dependant upon the length of the pendulum according to the formula

T=2pie (square root of L divided by 9.8) L= the length of the pendulum in metres.

Determine the time (T) if the clocks pendulum to complete one swing when the pendulum (L) is .85 metres long?

q2) a person pushes her daughter on a swing ands finds that it takes the girl on the swing 7 seconds from where she is let go to when she returns.How long is the rope of the swing to the nearest metre?