Please. Need help with quadratic word problem

AI Thread Summary
The discussion focuses on solving a quadratic word problem involving an object launched from a height. Key points include determining the equation of motion, calculating the object's height after 3 seconds, and identifying the time span it remains above 40 meters. Additionally, the maximum height and the time taken to reach it, as well as the time to hit the ground, are also addressed. The conversation emphasizes using the initial conditions and acceleration due to gravity to derive the necessary calculations.
tw1nky62
Messages
2
Reaction score
0
Please. Need help with quadratic word problem!

PLEASE HELP WITH THIS!
An object is launched upward at 9.8 meters per second (m/s) from a 39.2-meter tall platform.

a)write an equation representing this path

b) What is the height of the object after 3 seconds

c) For what time span is the object more than 40 meters above the ground?

d) what is the maximum height of the object

e) how long did it take for the object to reach maximum height

f) how long does it take for the object to hit the ground

g) State the practical domain

h) state the practical range
 
Physics news on Phys.org


please help me with this!
 


to get you started...

b) you know that the acceleration is - 9.8m/s^2 ( as its going against gravity), the initial velocity is 9.8 m/s and the time is 3s and you want out find its height. so use an equation that has all 4 of these into calculate the height and then add the initial 39.2m height onto this answer to give you your total max hieght.
 
Thread 'Struggling to make relation between elastic force and height'

Thread 'Struggling to make relation between elastic force and height'

Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »

Similar threads

Question about Projectile Motion: Throwing a Flower Pot from a Balcony
Replies
18
Views
1K
Simple Kinematics Problem, unsure of my error
Replies
5
Views
2K
Hard Kinematics problem: Ball thrown into the air
Replies
9
Views
3K
I'm having a comprehension issue with a 2-D motion problem.
Replies
7
Views
2K
Physics kinematics problem (not homework, but my own)
Replies
5
Views
2K
What is the maximum stretch of the bungee and will the mass hit the ground?
Replies
12
Views
2K
Rocket + Connected Body Dynamics problem
Replies
47
Views
3K
When to use quadratic equations?
Replies
11
Views
2K
Find Projectile Flight Time Given Only Maximum Height
Replies
4
Views
2K
I've forgotten the formula for distance thrown
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top