A2L Item 008

  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.

A toy rocket blasts off with an acceleration of 9.8 m/s2 upward. After 5 seconds the rocket releases its “payload” but continues to accelerate upward at the same rate. In the following graph the solid line represents the velocity of the rocket as a function of time and the dashed line represents the velocity of the payload.

Which of the following statements regarding this situation are correct?

A. The payload hits the ground at t = 10s.

B. The slope of the rocket’s velocity vs. time graph is 9.8 m/s2.

C. The velocities of the rocket and the payload point in opposite directions after the payload is released.

D. The area of the shaded region can be determined from the given information.

E. The payload spends half the time in the air as the rocket.

F. The payload is released at 1/2 the maximum height of the rocket.

  1. Only (A)
  2. Only (B)
  3. Only (C)
  4. Only (D)
  5. Only (E)
  6. Only (F)
  7. Two of the statements are true
  8. Three of the statements are true
  9. None is true