Difference between revisions of "03.2"
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| − | == | + | == A ball rolls off the edge of a cliff. The instant it leaves the edge, it has an initial horizontal velocity of 17.3 m/s, and it strikes the ground after 1.56 seconds.== |
===Problem One=== | ===Problem One=== | ||
Revision as of 20:00, 14 January 2010
A ball rolls off the edge of a cliff. The instant it leaves the edge, it has an initial horizontal velocity of 17.3 m/s, and it strikes the ground after 1.56 seconds.
Problem One
1. How high is the cliff? (11.9 m)
2. How far from the base of the cliff does the ball land? (27.0 m)
3. What is the speed of impact? (23.1 m/s)
Horizontal
s u = 17.3 m/s v a = 0 (horizontally) t = 1.56 s
Vertical
s u = 0 (purely horizontal) v a = -9.81 m/s/s (on earth) t = 1.56 s
