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candace3

Joined: 05 Jul 2010
Posts: 1
Location: USA

 Posted: Mon Jul 05, 2010 5:13 pm    Post subject: using laws of motion I think I have the correct answers for the following questions but can someone just let me know if they are correct?? 1. When you roll a bowling ball down the lane, it strikes the pins and continues on its path fairly uninterrupted. How can this be explained?( I choose D) a. The bowling ball has more acceleration than the pins and it pushes on past easier. b. The bowling pins are top heavy and so it is easy to push them out of the way. c. The pins have more inertia than the ball and so they push aside more easily. d. The ball has a great deal of inertia and continues its motion effectively. 2. When playing on a swing, small children quickly learn to pump the swing in the correct rhythm to make the swing go higher. Why does this work? ( I choose B) a. The applied force and the motion are in opposite directions. b. The applied force and the motion are in the same direction. c. The applied force and the motion are at angles to each other. d. It has little to do with force or motion; the rhythm "feels" right. 3. A ball attached to a string is swung around in a circle. What can be deduced from this motion?(I choose B) a. The string applies a force to the ball pushing towards the outside of the circle. b. The string applies a force to the ball pulling into the center of the circle. c. The ball has inertia which is redirected into a circular path. d. The string has little effect on the ball's motion. It moves in a circle because of the way you move your hand.
hepcj

Joined: 23 Jun 2007
Posts: 125

 Posted: Tue Jul 06, 2010 10:10 pm    Post subject: Your answers seem correct to me.
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