Force as a mover

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Force as a mover

"Pushing an object from rest causes it to move in the direction of the push." (diSessa, 1993) A physicist understands that the "at rest" condition is important when considering the push and the resulting motion. This isn't understood by naive individuals who incorrectly apply this p-prim to objects in motion. They incorrectly believe an additional push given to an object in motion will send the moving object in the direction of that force rather than deflect it(combine the force with the existing force). This p-prim can easily be experienced on the "Scratch" computer model which involves moving an object that follows Newton's Laws.