Speed of falling book

  • Thread starter Dino18
  • Start date
  • #1
Dino18
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A Physics book, mass unknown, is dropped 4.50m. What speed does the book have just before it hits the ground?
 

Answers and Replies

  • #2
cupid.callin
1,137
0


here v(final) = asked
h = 4.5
a=?
v(initial)= ?

can you tell 2 "?"
 
  • #3
Dino18
7
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initial velocity is 0 and a=?
 
  • #4
cupid.callin
1,137
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what is a in free fall?
 
  • #5
Dino18
7
0


Oh.. 9.8 m/s
 
  • #6
cupid.callin
1,137
0


there you go

now you know which eqn to use?
 
  • #7
Dino18
7
0


vf^2=vi^2+2ad
 
  • #8
cupid.callin
1,137
0


very good!!!!
 
  • #9
Dino18
7
0


Thx alot :smile:
 

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