Projectile Motion Ball Problem

  • Thread starter Jordan_
  • Start date
  • #1
20
0
A ball is thrown upward at an angle 30 degrees above the horizontal and lands on the top edge of a building 20 m away. The top edge is 5m above the throwing point. How fast was the ball thrown?

ANS 20 m/s.

I just can't seem to get this. It looks like there is a piece of info missing but I know that's not the case. Any hints?
 

Answers and Replies

  • #2
13
0
there are enough values to solve this problem
you need to calculate horizontal component and vertical component
 
  • #3
have you tried using v2= u2+2as ? I think rearranging that for u should work.
 
  • #4
13
0
you've got to compute horizontal and vertical component because the ball was not thrown directly upward.. it was thrown at 30 degrees
 

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