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Understanding Forces in Bicycle Motion

Learn about the forces acting on a student pedaling a bicycle at constant velocity in a straight line. Explore how the forces of pedaling, friction, and gravity interact and impact the movement of the bicycle.

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Understanding Forces in Bicycle Motion

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  1. Today’s DQ A student is pedaling a bicycle at a constant velocity in a straight line. Which statement accurately describes the forces? The bicyclist is experiencing no resisting forces. The forces between the bicyclist pushing the pedals and friction/gravity resisting the movement are balanced. The force of the bicyclist pushing the pedals is greater than the forces of friction and gravity. The forward movement of the bicycle has to do with motion, not force.

  2. A student is pedaling a bicycle at a constant velocity in a straight line. Which statement accurately describes the forces? • What are the key words!

  3. a) The bicyclist is experiencing no resisting forces. • Think to yourself, how is this possible?

  4. c) The force of the bicyclist pushing the pedals is greater than the forces of friction and gravity. • Think to yourself, if the force of the pedals is greater what would really be happening?

  5. d) The forward movement of the bicycle has to do with motion, not force. • Remember ALL motion is caused by unbalanced forces!

  6. b) The forces between the bicyclist pushing the pedals and friction/gravity resisting the movement are balanced. • Think to yourself, what makes this the correct answer? • If the velocity is constant and the direction is not changing, then the forces are balanced.

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