The pedals of a bicycle are mounted on a bracket whose centre is 27.5 cm above the ground. Each pedal is 17.5 cm from the bracket. Assume that the bicycle is pedalled at a rate of 10 cycles per minute. 1. Draw a graph showing the height of one of the pedals above the ground for the first 2 cycles with time in seconds. Assume that the pedal starts at the topmost position at t=0. 2. Write an equation modelling the height of the pedal as a function of time. 3. When is the pedal 15 cm above the ground for the 6th time?

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