- #1
Dino18
- 7
- 0
A Physics book, mass unknown, is dropped 4.50m. What speed does the book have just before it hits the ground?
What is the speed of a falling book dropped from 4.50m?
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Homework Help Overview
The problem involves determining the speed of a book just before it impacts the ground after being dropped from a height of 4.50 meters. The subject area pertains to kinematics and free fall motion.
Discussion Character
- Exploratory, Assumption checking, Mathematical reasoning
Approaches and Questions Raised
- Participants discuss the initial conditions of the problem, including the initial velocity and acceleration due to gravity. There are questions about the value of acceleration in free fall and the appropriate equations to use.
Discussion Status
The discussion has seen participants identifying key variables and suggesting relevant equations. Some guidance has been provided regarding the acceleration due to gravity, but there is no explicit consensus on the approach to take.
Contextual Notes
Participants are working with the assumption that the book is in free fall, and there is a focus on clarifying the values of initial velocity and acceleration. The mass of the book is noted as unknown, but it does not appear to impact the discussion directly.
- #2
cupid.callin
- 1,130
- 1
here v(final) = asked
h = 4.5
a=?
v(initial)= ?
can you tell 2 "?"
- #3
Dino18
- 7
- 0
initial velocity is 0 and a=?
- #4
cupid.callin
- 1,130
- 1
what is a in free fall?
- #5
Dino18
- 7
- 0
Oh.. 9.8 m/s
- #6
cupid.callin
- 1,130
- 1
there you go
now you know which eqn to use?
- #7
Dino18
- 7
- 0
vf^2=vi^2+2ad
- #8
cupid.callin
- 1,130
- 1
very good!
- #9
Dino18
- 7
- 0
Thx a lot
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