Physics for Scientists And Engineers Foundations And Connections 1st Edition by Debora M. Katz – Test Bank

1. 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  m/s². 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

ANSWER:   a

POINTS:   2

DIFFICULTY:   Average

2. A particle starts from the origin at t = 0 with a velocity of 6.0 m/s and moves in the xy plane with a constant acceleration of  m/s². 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

ANSWER:   b

POINTS:   2

DIFFICULTY:   Average

3. 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   m/s². 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

ANSWER:   d

POINTS:   2

DIFFICULTY:   Average

4. 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  m/s². 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

ANSWER:   a

POINTS:   2

DIFFICULTY:   Average

5. A particle moves in the xy plane with a constant acceleration given by   m/s². At t = 0, its position and velocity are  m and  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

ANSWER:   b

POINTS:   3

DIFFICULTY:   Challenging

6. A particle starts from the origin at t = 0 with a velocity of  m/s and moves in the xy plane with a constant acceleration of  m/s². 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

ANSWER:   d

POINTS:   2

DIFFICULTY:   Average

7. 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  m/s². 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

ANSWER:   c

POINTS:   2

DIFFICULTY:   Average

8. 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

  b.  21 s

  c.  24 s

  d.  14 s

  e.  19 s

ANSWER:   a

POINTS:   3

DIFFICULTY:   Challenging