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Posted 04 October 2001 - 01:53 PM
Members - Reputation: 130
Posted 04 October 2001 - 02:03 PM
Original post by Aj37
List all that apply. As a projectile moves through its parabolic trajectory, which of these quantities, if any can take the value "0" at least at some point during the passage.
A. horizontal component of velocity
B. vertical component of velocity
D. horizontal component of acceleration
E. Vertical component of acceleration
The correct answers are B and D. but I do not understand why. Can someone briefly explain?
It''s pretty simple. ''A'', ''E'' are all constant while a projectile is in motion, and while it moving it''s speed © > zero. That leaves ''B'' and ''D''. In parabolic motion ''D'' is always zero, and ''B'' is zero when a projectile is a the apex of it''s arc.
I hope that''s all clear (and right =)).
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Posted 09 October 2001 - 02:51 AM
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