Last Friday, in addition to being homecoming was Halloween. After the game, eating, Ho'olauleia (sp?), and the Burning of the I, my friends and I went trick or treating in Kahala. Outside of the mall, we there was a Longs shopping cart stuck in the mud. Robert climbed into the cart and I tried to pull him out of the grass. We truly are geniuses. However, when I tried pulling the cart wouldn't slide and Robert almost fell out. I was confused. I thought that when I pull an object, the object should move. However, I then remembered friction. Friction occurs when there is a force between two objects preventing them from being slid against one another. The rubber wheels and the dried mud clung together, thus making pulling the cart very difficult. When Robert went in the cart, friction increased. Friction is equal to normal force times the coefficient of friction. Since the coefficient of friction is constant, Robert's 140 pounds increased normal force by approximately 450 Newtons. Thus, our antics were impeded by the phun of friction.
1 comment:
ha I remember this and then robert could not get out of the cart.
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