Posted by Gail on Sunday, October 16, 2011 at 9:49am.
If it is thrown 30 degrees below horizontal, on level ground, it strikes the ground right away.
Are you sure you copied the problem correctly?
yes the question was copied correctly.
How high is the stone when thrown?
There was no height given and no other info given for this problem. Per the textbook, the answers are (a) 1.57sec (b) 41.9m/s (c) 51.3m/s and -45 degree angle. But I can't figure out how the answers were calculated?
Nor can I.
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