Please help projectile motion problem

  • Thread starter phys1618
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  • #1
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Please help!! projectile motion problem..

Homework Statement



a student throws a water balloon vertically downward fromt he top of a building; the balloon leaves the thrower's hand with a velocity of 10 m/s.
1.what will be its velocity after falling for 2 seconds?
2.what will be its velocity after falling 10 meters?
3.If it moved a distance of 1 meter while int he throwers' hand, find it's accelereation while in his hand.

Homework Equations




d=(vi+vf)t
2

a= (vf-vi)/t

The Attempt at a Solution



I think i can get the answers to 1 and 2. I'm clueless on #3.
thank you for all help!!! greatly appreciated.
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
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Homework Statement



a student throws a water balloon vertically downward fromt he top of a building; the balloon leaves the thrower's hand with a velocity of 10 m/s.
1.what will be its velocity after falling for 2 seconds?
2.what will be its velocity after falling 10 meters?
3.If it moved a distance of 1 meter while int he throwers' hand, find it's accelereation while in his hand.

Homework Equations




d=(vi+vf)t
2

a= (vf-vi)/t

The Attempt at a Solution



I think i can get the answers to 1 and 2. I'm clueless on #3.
thank you for all help!!! greatly appreciated.

Your second equation will find the velocity after 2 seconds, but your first equation neglects to take into account the acceleration of gravity.

Consider using the relationship that vf2 = vi2 + 2a*x for part 2.

As to your third question, you have the distance, and initial V was at rest and final V is 10m/s so ... use the same equation to figure a.
 
  • #3
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Thank you LowlyPion. I greatly appreciates your fast help. I have the problem solved with no problem. Thanks. however, I do have a another problem just posted. if you can take a look and help me..thank you for your time and help.
 

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