# F04s - Physics 4A FIRST EXAM Chapters 1 4 Fall 2004 Name...

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Physics 4A FIRST EXAM Chapters 1 - 4 Fall 2004 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 which are on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. A 350g cart initially at rest is given a push to the right along a level track beginning at t = 0s. The motion sensor plots the velocity as a function of time as shown in the graph at the right. Answer the following questions. Be sure to explain your answers for full credit. (a)How much time elapses while the cart being pushed? How do you know? The cart is being pushed for 2s because the cart is speeding up during the first two seconds according to the graph. (b)How far does the cart travel while being pushed? How do you know? According to the definition of velocity, distance traveled is the area under the velocity vs. time graph.

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F04s - Physics 4A FIRST EXAM Chapters 1 4 Fall 2004 Name...

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