Velocity Of The Ice As It Hits The Ground?

Click For Summary
SUMMARY

The discussion centers on calculating the velocity of a chunk of ice falling from the John Hancock Center in Chicago, which stands at 343 meters. The initial velocity (Vi) is 0 m/s, and the acceleration due to gravity (A) is 9.8 m/s². Using the formula Vf² = Vi² + 2as, the final velocity (Vf) is calculated to be 82 m/s. A common mistake noted in the discussion is the incorrect use of negative gravity, which should be positive as the object accelerates towards the Earth.

PREREQUISITES
  • Understanding of basic physics concepts, specifically kinematics
  • Familiarity with the equations of motion
  • Knowledge of gravitational acceleration (9.8 m/s²)
  • Ability to perform algebraic manipulations
NEXT STEPS
  • Study the equations of motion in detail, focusing on free fall scenarios
  • Learn about the effects of air resistance on falling objects
  • Explore real-world applications of kinematics in engineering
  • Investigate the impact of height on falling objects using simulation tools
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the principles of motion and gravity in real-world contexts.

luvzdaladeez
Messages
3
Reaction score
0
The John Hancock Center In Chicago Is The Tallest Building In The United States In Which There Are Residential Apartments. The Hancock Center Is 343m Tall. Suppose A Resident Accidentally Causes A Chunk Of Ice To Fall From The Roof. What Would Be The Velocity Of The Ice As It Hits The Ground? Neglect The Air Resistance
 
Last edited by a moderator:
Physics news on Phys.org
Seem pretty stright forward, what is your question?
 
luvzdaladeez said:
The John Hancock Center In Chicago Is The Tallest Building In The United States In Which There Are Residential Apartments. The Hancock Center Is 343m Tall. Suppose A Resident Accidentally Causes A Chunk Of Ice To Fall From The Roof. What Would Be The Velocity Of The Ice As It Hits The Ground? Neglect The Air Resistance


1) What did you try?
2) See above
3) Think energy
 
Ok I Tried


D=343m
Vi=0
A= -9.8 M/s


Looking For Vf=


Vf^2=0^2+2 X -9.8 X 343

And Then I Solved It From There
 
Looks like.
 
s=343 u=0 a=9.8


v^2=u^2+2as

v^2=2as

v^2=2*343*9.8
v^2=6722.8
v=82 m/s

the mistake you've made is putting gravity as -9.8 when it is actually 9.8 as the object is accelerating towards the earth.
 

Similar threads

How long it takes for the ice block to hit the ground
  • · Replies 11 ·
Replies
11
Views
3K
How Does a Block of Ice Move When Sliding Off a Sloped Roof?
  • · Replies 5 ·
Replies
5
Views
3K
Finding Final Velocity or Setting it Equal to 0(Kinematics)
  • · Replies 5 ·
Replies
5
Views
3K
Projectile motion: Two Balls and Building
  • · Replies 9 ·
Replies
9
Views
2K
Ball Release and Thrown to reach ground at the same time
  • · Replies 1 ·
Replies
1
Views
2K
Where Will the Plane Be When the Package Hits the Ground?
  • · Replies 1 ·
Replies
1
Views
7K
Calculating the Velocity and Time of a Freely Falling Rock
  • · Replies 2 ·
Replies
2
Views
2K
Dropping two balls, one with twice the mass
  • · Replies 7 ·
Replies
7
Views
5K
Which ball will hit the ground first?
  • · Replies 4 ·
Replies
4
Views
4K
Three balls are dropped, find position of each ball
  • · Replies 7 ·
Replies
7
Views
3K