Projectile motion from the ground

AI Thread Summary
In the discussion on projectile motion, the variable s with a subscript y represents the vertical distance traveled. The gravitational acceleration is noted as -32 ft/s², reflecting the use of feet as the unit of measurement. The solution confirms that the vertical distance is zero at both the start and end of the projectile's trajectory, as both points are at ground level. This reinforces the understanding of vertical motion in projectile problems. The clarification on these points aids in solving the associated homework problem effectively.
Scorry
Messages
17
Reaction score
1

Homework Statement



The problem (5.9) and given data is attached.

Homework Equations


All relevant equations are given (5.9).

On (5.9) What does the s subscript y represent? And why does gravity equal -32?

The Attempt at a Solution


The solution is given. This is a scan problem.
 

Attachments

  • image.jpg
    image.jpg
    75.5 KB · Views: 421
Physics news on Phys.org
They are using the variable s to represent distance (This is a common practice in some texts). So ##s_y## would be the distance in the "y" (vertical) direction. ##32 ft/s^2## is the gravitational acceleration using feet rather than meters for distance.
 
Thank you gneill. Is the distance in the "y" vertical direction 0 because its final position is the ground?
 
Scorry said:
Thank you gneill. Is the distance in the "y" vertical direction 0 because its final position is the ground?
It's 0 at the beginning and end of the trajectory, both at ground level.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
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

Find the height of a lamp based on the velocities of projectiles
Replies
40
Views
2K
Projectile Motion Experiment: Results Too High?
Replies
2
Views
2K
Find Projectile Flight Time Given Only Maximum Height
Replies
4
Views
2K
Why does this not work? Projectile Motion problem for Dynamics Class
Replies
19
Views
3K
Projectile Motion Graph Analysis
Replies
1
Views
2K
Horizontally Launched projectile landing on curved ground
Replies
11
Views
2K
Projectile Motion: time it takes for projectile to hit truck
Replies
15
Views
3K
Projectile Motion - object that is shot at an angle of 55 degrees
Replies
8
Views
2K
Projectile Motion Experimental Error
Replies
1
Views
2K
Projectile Motion on the Moon: Finding the Optimal Launch Angle Using Equations
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top