- #1
princessotes
- 2
- 0
Homework Statement
Humpty Dumpty had a great fall from a roof. It took him 2.25s to fall. How high was the roof?
Kinematics Problem: How High Was Humpty Dumpty's Fall?
- Thread starter princessotes
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SUMMARY
The discussion centers on calculating the height from which Humpty Dumpty fell, given a fall time of 2.25 seconds. The relevant kinematic equation used is H = ut + 1/2at², where initial velocity (u) is 0 and acceleration (a) is equal to gravitational acceleration (g). Participants confirm that the scenario describes free-fall motion, leading to the conclusion that the height can be accurately determined using the provided equation. However, one participant encountered issues with calculator input, indicating the need for careful numerical entry.
PREREQUISITES- Understanding of kinematic equations, specifically H = ut + 1/2at²
- Knowledge of gravitational acceleration (g) as approximately 9.81 m/s²
- Basic proficiency in algebra for solving equations
- Familiarity with free-fall motion concepts
- Practice solving problems using kinematic equations in physics
- Learn about the effects of air resistance on free-fall motion
- Explore advanced topics in projectile motion
- Review calculator functions and common errors in inputting equations
This discussion is beneficial for physics students, educators, and anyone interested in understanding kinematics and free-fall motion calculations.
Humpty Dumpty had a great fall from a roof. It took him 2.25s to fall. How high was the roof?
- #2
ehild
Science Advisor
Homework Helper
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princessotes said:
The policy here is that you have to show your attempt at a solution. How does Humpty-Dumpty move? with constant velocity? Or does he accelerate?
- #3
harsh_sinha
- 11
- 2
It seems like a case of free-fall.
u=0,a=g and t is given
Use the equation H=ut+1/2at2
But this is what I presume.There isn't any clear information about the motion of Humpty Dumpty.
u=0,a=g and t is given
Use the equation H=ut+1/2at2
But this is what I presume.There isn't any clear information about the motion of Humpty Dumpty.
- #4
princessotes
- 2
- 0
Thanks, I got it.
I used H=ut+1/2at2
but it seemed I was inputting the wrong digit to the calculator
I used H=ut+1/2at2
but it seemed I was inputting the wrong digit to the calculator
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