15. How far from the base of the cliff will the ball land?
A)2 sB) 2.8 sC) 4.6 sD) 6 sE) 9.2 s
16. How much time will pass before the ball hits theground?
Base your answers to questions
17
and
18
on the
following information.
From a cliff of height 28.8 m above the ground, a
ball is thrown horizontally with an initial velocity of
7 m/s.
17. What is the range of the ball?
18. The magnitude of the velocity of the ball when itstrikes the ground is most nearly
19. An object moving horizontally with speedvfalls offthe edge of a vertical cliff and lands a distancedfrom the base of the cliff. How far from the base ofthe cliff would the object land if the height of thecliff was doubled?
A)tB)tC)tD) 2tE) It could not be determined unless the height ofthe cliff was known
20. An object moving horizontally with speed
vfalls offthe edge of a vertical cliff and takes a timetto land.How long would it take for the object to land if itwas moving with a horizontal velocity 2v?

Multiple Choice
21. Base your answer to the following question on the
information below.
A 4.0 kg block rests at the edge of a platform that is
20 m above level ground. The block is launched
horizontally with an initial velocity of 15 m/s.
The time it would take to reach the ground is most
nearly
Base your answers to questions
22
through
26
on the following information.
A cannonball is fired and follows the parabolic path shown below. Air resistance is negligible. Point
B
is the highest point on the path and points
A
and
C
are at the same height.
A) up and to the right
B) to the right
C) down and to the right
D) down
E) There is no net force on the cannonball at point
A
22. Which of the following best describes the direction of the net force on the ball at pointA?
23. Which of the following best describes the direction of the velocity of the cannonball at pointB?

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