# F03s(2) - Physics 4A THIRD EXAM Chapters 1 13 Fall 2003...

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Physics 4A THIRD EXAM Chapters 1 - 13 Fall 2003 1 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles shown on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. A bug flying northward at 8.00m/s collides with the windshield of a car traveling southward at 20.0m/s. Answer the following questions. For full credit, you must explain your thinking. Be sure to cite any relevant principles of physics. Which object, the bug or the car: (a)feels the greater force during the collision? BOTH THE SAME Newton’s Third Law states that if one object exerts a force on a second object the second object always exerts an equal force back on the first object. (b)has the greater acceleration during the collision? BUG Newton’s Second Law states that the acceleration of an object is proportional to the net force acting on it and inversely proportional to its mass. Since both objects feel the same size force, the one with the smaller mass will have the larger acceleration. (c)has the greater impulse on it during the collision? BOTH THE SAME

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F03s(2) - Physics 4A THIRD EXAM Chapters 1 13 Fall 2003...

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