Physics help please

  • Thread starter Lilly
  • Start date
  • #1
12
0
hi, if anyone knows how to do this question, could you please get me started?????

A ball is thrown upward from the ground with an initial speed of 23.2 m/s; at the same instant, a ball is dropped from a building 16.1 m high. After how long will the balls be at the same height?
thanks...
 

Answers and Replies

  • #2
1,605
2
Find a formula for the height of the first ball as a function of time. call this h_1(t).

Find a formula for the height of the second ball; call that h_2(t).

Then what can you do with the two height formulas to find out when the two balls are at the same height?
 
  • #3
12
0
thanks, i figured it out! :)
 
  • #4
1,605
2
you're welcome. :smile:
 

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