Phys101-Oldexams-Ch2

# Phys101-Oldexams-Ch2 - Old Exam Questions Ch.2 T072 Q2.The...

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21 Old Exam . Questions Ch.2 T072 Q2 .The position of an object is given as a function of time by 23 4.0 3.0 xt t =− , where x is in meters and t is in seconds. Its average acceleration during the interval from t = 1.0 s to t = 2.0 s is:(Ans: 19 m/s 2 ) Q3.: A car starts from rest and undergoes a constant acceleration. It travels 5.0 m in the time interval from t = 0 to t = 1.0 s. Find the displacement of the car during the time interval from t = 1.0 s to t = 2.0 s.( Ans: 15 m) Q4 . Fig. 1 represents the velocity of a car (v) moving on a straight line as a function of time (t). Find the acceleration of the car at 6.0 s. (A ns: -3.0 m/s 2 ) T071 : Q3 .Fig 1 shows the position-time graph of an object. What is the average velocity of the object between t=0.0 s and t= 5.0 s? (Ans: 2.0 m/s) Q4. Fig 2 shows a velocity-time graph of a runner. If the runner starts from the origin, find his position at t = 4.0 s.( Ans: 45 m)

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22 Q5. An object is thrown vertically upward with an initial speed of 25 m/s from the ground. What is the height of the object 1.0 s before it touches ground? (Ans:20 m) Q6 . A car starts from rest and accelerates at a rate of 2.0 m/s 2 in a straight line until it reaches a speed of 20 m/s. The car then slows down at a constant rate of 1.0 m/s 2 until it stops. How much time elapses (total time) from start to stop? (Ans: 30 s) T062 Q3: A car travels along a straight line at a constant velocity of 18 m/s for 2.0 s and then accelerate at 6.0 m/s 2 for a period of 3.0 s . The average velocity of the car during the whole 5.0 s is: (Ans: 13 m/s) Q4. The velocity as a function of time for a particle moving along the x -axis is shown in Fig.1. The motion clearly has two different parts: the first part is from t = 0 to t = 2.0 s
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## This note was uploaded on 09/01/2011 for the course PHY 303 taught by Professor Erskine/tsoi during the Spring '08 term at University of Texas.

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Phys101-Oldexams-Ch2 - Old Exam Questions Ch.2 T072 Q2.The...

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