Pulling the cart with a constant force–science 7

Please respond to the following in a thoughtful blog post entitled: Pulling a cart with a constant force. Address each point. Tag with Science 7. (Be sure that categories are visible and that you have a search box.)

Most people expected that pulling the cart with a constant force would result in constant speed (a graph plotting distance vs. time would show a straight upward sloping line). Why do you think that people imagine that a constant force results in constant speed? How do you understand the results (see graphs of 3 trials below–where the graph line curves upward, indicating increasing speed)? How do Newton’s ideas about inertia and force come into play? What happens if we have a person walking along the same track as the car. They start together. The person walks with a constant speed and the cart moves with a constant force applied throughout. How do the motions of the person walking and the cart compare?

Pulling Cart with Constant Force Data

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