# physics

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imagine a flat, lightweight wheeled cart that's low to the ground and has well-oiled bearings. what would happen if you approached the cart, stepped onto it, and walked along its length at a constant speed? it would
a) remain nearly stationary
c) move rapidly in the opposite direction
d) move forward then backward
e) none of the above

• physics -

it would move in the opposite direction due to conservation of linear momentum, but I don't really know why it would be considered 'rapid'...

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