Finding Initial Velocity to Equations

AI Thread Summary
To find the initial velocity of an object, the appropriate equations depend on the known variables. Key equations include V = Vi + at, s = ut + 0.5at^2, and v^2 = u^2 + 2as. There is no single equation for calculating initial velocity; instead, it requires working backward from final conditions if needed. The choice of equation is contingent upon the information available. Understanding the context of the problem is essential for determining the correct approach.
navarro714
Messages
4
Reaction score
0
What equation do I use to find the initial velocity of an object?
 
Physics news on Phys.org
You can use Velocity = Initial Velocity + Acceleration*Time

V=Vi + at
 
Or s = ut + 0.5at^2

or v^2 = u^2 + 2as

it depends on what you know already.
 
There is no equation "to find the initial velocity of an object".
 
Sorry -- that was a bit hasty. I guess there could be a problem that gave you final conditions and asked you to work backward to the initial conditions. As tyco05 said the equations you would use to do that would depend on what you already know so there is no equation in general "to find the initial velocity of an object".
 
tyco05 said:
or v^2 = u^2 + 2as

Thank you!
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Projectile motion, initial height and range given, find initial velocity
Replies
8
Views
1K
projectile motion problem with no initial velocity given
Replies
3
Views
658
Projectile motion problem – determining initial velocity of throw
Replies
3
Views
2K
Projectile Motion Problem Involving Initial Velocity and Gravity Only
Replies
11
Views
1K
Trying to Calculate Initial Velocity and Final Velocity
Replies
2
Views
689
Solving for Time Given Acceleration & Initial Velocity
Replies
3
Views
1K
Query related to Two-Dimensional Motion
Replies
9
Views
1K
Find the initial velocity ##U##
Replies
3
Views
814
The final velocity = initial velocity + acceleration x time
Replies
17
Views
2K
Solving for Work Done When Accelerating a Mass
Replies
3
Views
720

Hot Threads

Recent Insights

Back
Top