Ch02test_1DMotion (1)

# Ch02test_1DMotion (1) - PHYS101 Chapter 2 Motion in One...

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PHYS101 Chapter 2 Motion in One Dimension 1. The position of a particle moving along the x axis is given by x = (21 + 22t – 6.0 t 2 ) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s? a. –6.0 m/s b. –4.0 m/s c. –2.0 m/s d. –8.0 m/s e. 8.0 m/s 2. A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board? a. –500 km/s 2 b. –550 km/s 2 c. –360 km/s 2 d. –520 km/s 2 e. –275 km/s 2 3. The position of a particle moving along the x axis is given by x = 6.0 t 2 – 1.0 t 3 , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction? a. 24 m b. 12 m c. 32 m d. 16 m e. 2.0 m 4. The velocity of a particle moving along the x axis is given for t > 0 by v x = (32.0 t – 2.00 t 3 ) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction? a. –64.0 m/s 2 b. zero c. 128 m/s 2 d. 32.0 m/s 2 e. –32.0 m/s 2 5. The position of a particle as it moves along the x axis is given for t > 0 by x = ( t 3 – 3 t 2 + 6 t )m, where t is in s. Where is the particle when it achieves its minimum speed (after t = 0)? a. 3 m b. 4 m c. 8 m d. 2 m e. 7 m 6. The position of a particle as it moves along the x axis is given by x = 15 e -2t m, where t is in s. What is the acceleration of the particle at t = 1 s? a. 22 m/s b. 60 m/s c. 8.1 m/s d. 15 m/s e. 35 m/s 7. The position of a particle moving along the x axis is given by x = 4.0 t e -t , where x is in m and t is in s. What is the position of the particle when its acceleration is zero? a. 1.1 m b. 3.8 m c. 1.8 m d. 2.7 m e. 6.2 m 8. V x is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s? a. –2.0 m b. +2.0 m c. +1.0 m d. –1.0 m e. 6.0 m 9. A particle moving along the x axis has a position given by x = (24 t – 2.0 t 3 ) m, where t is measured in s. How far is the particle from the origin ( x = 0) when the particle is not moving? a. 23 m b. No distance. The particle is always moving. c. 32 m d. 40 m e. 17m 10. A particle moving along the x axis has a position given by x = (24 t – 2.0 t 3 ) m, where t is measured in s. What is the magnitude of the acceleration of the particle when the particle is not moving? a. 24 m/s 2 b. zero c. 12 m/s 2 d. 48 m/s 2 e. 36 m/s 2 11. At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the velocity of the particle at t = 5.0 s? a.

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Ch02test_1DMotion (1) - PHYS101 Chapter 2 Motion in One...

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