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Momentum is velocity times mass. In the lawn mower world you want to have your lawn mower the lightest and not very big so that it can reach it speed the fast. Newton's first law states that an object in motion will stay in motion. As long as you have gas in your lawn mower than you can stay in motion but as soon as that motor cuts off than your motion will stop.
Newton's second lawn says that if you put force on an object it will go in the direction that you place the force on. When you put your hand on the shifter and put it in a gear 1-6 then its going forward but if you put it in reverse then it will go back words.
Newton's third law says that for every force there is an equal and opposite force. When you let off the clutch then you will start moving forwards but at the same time u could be going up a hill and then it will be trying to pull you down and then you will be going back words.
you see racing lawn mowers have a lot to do with physics
yes it does
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