Math - Term 3 Week 2

Hello people reading this,

For math we had to solve these math problems with a partner.

Here are the questions.

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1. 
   

A. Using the image above, what is the ratio between the pedal gear and sprocket?

B. If you were to turn the crank 9 full rotations how many revolutions would the wheel do?

C. If one rotation of the pedal gear moves the bike 150cm,

how far will the bike travel around the track if you did 5 full rotations of the pedal gear.

D. Which gear ratio would you have to pedal more as you go once around the

bike track - 4:1 or 2:1, what is your reasoning?

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Here are me and my partners answers

A. Me and my partner got the answer 3:1. If the Pedal gear (39 teeth) does one rotation then the Sprocket (13 teeth) does three rotations because 13 times 3 is 39.

B. (I don't remember doing this with my partner. I think we did it but I can't remember the answer. Sorry)

C. Me and my partner got the answer 750 because I full rotation is 150cm and they asked for 5 full rotations, so 150 x 5 = 750.

D. We thought about the first question and the answer (3:1) if the sprocket was smaller (4:1) then you would pedal more because the pedal gear will have even more teeth then the Sprocket.

goodbye my wonderful friends.

see you in the next one!