When my mother was using her stationary bike today, it suddenly reminded me of a physics concept. As she keeps on cycling for any amount of time, her "distance" on the bike may say some funky number, like eleven miles, but she hasn't traveled anywhere. Even if she is exercising, her displacement will stay zero because she is not moving. Because her displacement is zero, her velocity will also be zero.No matter how fast she pedals, no matter what her speed is, she will always stay at the displacement zero and her velocity will stay as zero. For example, the bike, which has a little screen that tells how far she has "traveled" and how long she has traveled, says that she has pedaled 1 mile in 10 minutes. Her average speed would be 6 miles an hour, but her displacement and velocity are both zero.
Sadly, my mother was hesitant to take a picture, and she hid her face with a newspaper while i snapped the photograph. With or without her face in the picture, she still perfectly demonstrates zero displacement and velocity.
2 comments:
hello! That's a good one. all of a sudden i wished i had a stationary bike in my house.
acceleration would also be zero too.. right? >< good job so farr.
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