Thursday

March 26, 2015

March 26, 2015

Posted by **Sarah** on Thursday, August 31, 2006 at 11:15am.

a) How far apart are the two masses after 0.5 s?

b) Will the massses ever meet or pass each other? And if so will the meeting place take place while both masses are falling or when one is falling and the other is rising?

a) I got 30 - 15t

30-15(.5 seconds)=22.5 meters

b) I need help on this part of the queston.

Did I do part a correctly?

distance apart= 30- 1/2 g (t)^2 - 15t + 1/2 g t^2

distance apart= 30 -15t

t= .5 second

If they meet, distance apart is zero

solve for t.

See what the velocity of the ball thrown upwards is at that time. Is it positive (upward) or not.

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