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Kinematics Problem on a tower

  • Thread starter caller
  • Start date
  • #1
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Homework Statement



An object is dropped from a tower. if it had been thrown down at 60m/s, it would have taken half the time. What is the height of the tower? (Use gravity as 10m/s2)

Givens
Acceleration = 10m/s2
v1 = 0m/s (not sure)
v2 = 60m/s
time = t/2

Homework Equations



d=v1*t+(1/2)*a*t2

The Attempt at a Solution



I tried doing the questions, but i don't understand.

The correct answer is 320m, but i don't know how to get to it.

Any help is appreciated.

Thanks
 

Answers and Replies

  • #2
1,860
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Well, how much time does it take for an object at rest to fall and how much time does it take for an object thrown down to fall?
 

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