physics and bicycles

posted by .

I have aq uick question about bicycles relating to physics. I hope you can understand this!

First (technical question) why don't bikes move backward when you pedal backward?

On to the physics. A string is tied to a bike enabling one to pull the pedal from the down position (so that the pedals are turining in a clockwise fashion instead of counter clockwise) from in front of the bike. The bike moves forward. Why does this occur?

My answer involved the force (and torque) being large and in the direction forward where the bike would move. Any friction from the gears, etc. would be overcome.

Some bikes can go backwards...I am thinking of the bikes used by acrobatics on circus high wires.

Normal bikes cant petal backwards because of a clutch that allows the rear wheel to turn faster than the pedals.

The string on the petal is mechanically linked (string, petal, chain, rear wheel hub, rear wheel) to the rear wheel which moves the bike forward.

is the front of the bycycle facing lerf or right?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. economics

    Suppose we have the following market supply and demand schedules for bicycles: Price Quantity Demanded Quantity Supplied $100 70 30 $200 60 40 $300 50 50 $400 40 60 $500 30 70 $600 20 80 Plot the supply curve and the demand curve for …
  2. Math - Division

    I can't quite solve this question. Of 98 bicycles in a bike rack, 67 are mountain bikes. What fraction of the bicycles are not mountain bikes?
  3. Physics

    You are riding on a flatbed truck moving at 50 kilometers per hour. You have two identical guns, one aimed forward and one aimed backward, and you fire them at the same time. According to an observer in the ground, 1. the backward …
  4. math

    A factory produces bicycles at a rate of 80+0.3t^2−1.1t bicycles per week (t in weeks). How many bicycles were produced from day 15 to 21?
  5. Math

    The owner of a bicycle factory said about 15,000 bicycles were made last month. What is the least number of bicycles that could have been made?
  6. math

    a cycle company make bicycles, tricycles an unicycles. Last week they made 120 more bicycles than unicycles, and 4 times as many tricycles as unicycles. If they made 75 more bicycles than tricycles, how many unicyles did they make?
  7. physics

    Q1-In hugyen's principle of wave theory why the waves are move in forward direction not in backward direction means they move forward as a new source why not in backward direction?
  8. hurestics

    There are 74 tricycles and bicycles in a shop. There are 87 more wheels on the tricycles than on the bicycles. How many bicycles are there?
  9. Math Calc

    A factory produces bicycles at a rate of 100+0.4t2−0.7t bicycles per week (t in weeks). How many bicycles were produced from day 15 to 28?
  10. Algebra

    A company manufactures high-end racing bicycles. The total cost to manufacture 28 bikes is $25005. The daily fixed costs are $2605. Fixed costs refers to expenses that must be paid even when producing zero bikes, such as rent, utilities, …

More Similar Questions