Ch04test_2DMotion (1)

# Ch04test_2DMotion (1) - 1 Multiple Choice 1 A particle...

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1 Multiple Choice 1. A particle starts from the origin at t = 0 with a velocity of 8.0j m/s and moves in the xy plane with a constant acceleration of (4.0i + 2.0j) m/s 2 . At the instant the x coordinate of the particle is 29 m, what is the value of its y coordinate? a. 35 m b. 39 m c. 45 m d. 42 m e. 29 m 2. At t = 0, a particle leaves the origin with a velocity of 9.0 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (2.0i – 4.0j) m/s 2 . At the instant the x coordinate of the particle is 15 m, what is the speed of the particle? a. 10 m/s b. 16 m/s c. 12 m/s d. 14 m/s e. 26 m/s 3. A particle starts from the origin at t = 0 with a velocity of 6.0i m/s and moves in the xy plane with a constant acceleration of (–2.0i + 4.0j) m/s 2 . At the instant the particle achieves its maximum positive x coordinate, how far is it from the origin? a. 36 m b. 20 m c. 45 m d. 27 m e. 37 m 4. A particle leaves the origin with a velocity of 7.2 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (3.0i – 2.0j) m/s 2 . At the instant the particle moves back across the x axis ( y = 0), what is the value of its x coordinate? a. 65 m b. 91 m c. 54 m d. 78 m e. 86 m 5. At t = 0 a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction. Its acceleration is given by a = (3.0i – 2.0j) m/s 2 . At the instant the particle reaches its maximum y coordinate how far is the particle from the origin? a. 11 m b. 16 m c. 22 m d. 29 m e. 19 m 6. A particle moves in the xy plane with a constant acceleration given by a = –4.0j m/s 2 . At t = 0 its position and velocity are 10i m and (–2.0i + 8.0 j) m/s, respectively. What is the distance from the origin to the particle at t = 2.0 s? a. 6.4 m b. 10 m c. 8.9 m d. 2.0 m e. 6.2 m 7. A particle starts from the origin at t = 0 with a velocity of (16i – 12j) m/s and moves in the xy plane with a constant acceleration of a = (3.0i – 6.0j) m/s 2 . What is the speed of the particle at t = 2.0 s? a. 52 m/s b. 39 m/s c. 46 m/s d. 33 m/s e. 43 m/s 8. At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive x direction and moves in the xy plane with a constant acceleration of (–2.0i + 4.0j) m/s 2 . At the instant the y coordinate of the particle is 18 m, what is the x coordinate of the particle? a. 30 m b. 21 m c. 27 m d. 24 m e. 45 m 9. At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (2.0i – 4.0j) m/s 2 . At the instant the particle moves back across the x axis ( y = 0), what is the speed of the particle? a. 16 m/s b. 17 m/s c. 18 m/s d. 14 m/s e. 22 m/s 10. The initial speed of a cannon ball is 0.20 km/s. If the ball is to strike a target that is at a horizontal distance of 3.0 km from the cannon, what is the minimum time of flight for the ball? a. 16 s

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Ch04test_2DMotion (1) - 1 Multiple Choice 1 A particle...

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