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Just need someone to double check

by Melchior25
Tags: check, double
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Melchior25
#1
Jan28-08, 02:41 PM
P: 30
Could anyone please double check my answers to each of the following statements. Thanks

1. The problem statement, all variables and given/known data

Determine which of the following moving objects obey the equations of projectile motion.

True A stone is thrown under water.
True A ball is thrown in an arbitrary direction.
True A jet airplane crosses the sky with its engines thrusting the plane forward.
True A rocket moves through the sky after its engines have failed.
False A rocket leaves the launch pad.
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PhanthomJay
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Jan28-08, 03:36 PM
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Quote Quote by Melchior25 View Post
Could anyone please double check my answers to each of the following statements. Thanks

1. The problem statement, all variables and given/known data

Determine which of the following moving objects obey the equations of projectile motion.

True A stone is thrown under water.
True A ball is thrown in an arbitrary direction.
True A jet airplane crosses the sky with its engines thrusting the plane forward.
True A rocket moves through the sky after its engines have failed.
False A rocket leaves the launch pad.
Not all your answers are correct, even when air resistance is neglected (which should have been stated in the problem). Hint: There is only one force acting on an object in ideal projectile motion problems. What is that force? How does it affect your answers?


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