Time to reach maximum height

  • Thread starter jannx3
  • Start date
  • #1
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Homework Statement



find time to reach max height
max height is 0.870m
mass of diver is 70kg
makes an angle when diving of 85 degrees

Homework Equations



Vf=Vi + gt


The Attempt at a Solution


Vi=0
Vf=gt
t=vf/g
= 0.870/9.8

not sure if this the right approach
 

Answers and Replies

  • #2
6,054
390
When somebody is "diving", the direction is generally downward. One cannot reach a max height moving downward. State the problem correctly and fully, it is in your interest to eliminate any guesswork for us.
 
  • #3
6
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so when the person is diving from a diving board, it jumps upward before diving downwards into the water
 
  • #4
6,054
390
So in fact the question is about jumping, not diving?

Then, when you say "makes an angle" - makes an angle WITH WHAT?
 
  • #5
6
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so im assuming the height of the diver? which is 1m , theres all the information given
 
  • #6
6,054
390
OK, assuming the angle is with the vertical.

In your attempt, why does ##v_i = 0##? Surely when somebody jumps, they have a non-zero velocity initially?
 

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