Difference between revisions of "03.2"
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== Fun Physics Stuff!! == | == Fun Physics Stuff!! == | ||
===Problem One=== | ===Problem One=== | ||
| + | 1-3: 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. | ||
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| + | 1. How high is the cliff? (11.9 m) | ||
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| + | 2. How far from the base of the cliff does the ball land? (27.0 m) | ||
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| + | 3. What is the speed of impact? (23.1 m/s) | ||
| + | <br><br> | ||
| + | Horizontal | ||
| + | s | ||
| + | u = 17.3 m/s | ||
| + | v | ||
| + | a = 0 (horizontally) | ||
| + | t = 1.56 s | ||
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| + | <br><br> | ||
| + | Vertical | ||
| + | s | ||
| + | u = 0 (purely horizontal) | ||
| + | v | ||
| + | a = -9.81 m/s/s (on earth) | ||
| + | t = 1.56 s | ||
Revision as of 20:59, 14 January 2010
Fun Physics Stuff!!
Problem One
1-3: 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.
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
