What is the Velocity of the Third Object After Explosion?

  • Thread starter Thread starter VanKwisH
  • Start date Start date
  • Tags Tags
    Collisions
AI Thread Summary
The problem involves an object that explodes into three equal masses, with one mass moving east at 15.0 m/s and another at 10.0 m/s at a 45-degree angle south of east. Since the object exploded from rest, the total momentum before the explosion is zero, meaning the momentum after the explosion must also equal zero. To find the velocity of the third object, conservation of momentum principles must be applied, taking into account the vector components of the known velocities. The discussion emphasizes the importance of understanding momentum conservation in this scenario, particularly given the absence of friction. The solution hinges on calculating the third mass's velocity to ensure total momentum remains balanced.
VanKwisH
Messages
107
Reaction score
0

Homework Statement


An object explodes into 3 equal masses. One mass moves east at a velocity of
15.0 m/s . If a second mass moves at a velocity of 10.0 m/s 45degrees south of east.
What is the velocity of the 3rd object


Homework Equations


I know m1 = m2 = m3 therefore we have just M


The Attempt at a Solution



I have no idea where to start ... can anyone help me get started at least??
 
Physics news on Phys.org
Momentum has to be conserved from the Center of mass but you were never given an initial velocity I don't think you can solve it?

EDIT: Did the object explode form rest?
 
yes it exploded from rest, and my teacher said in this case there is no friction ...
 
VanKwisH said:
yes it exploded from rest, and my teacher said in this case there is no friction ...

Momentum has to be conserved for the center of mass of the individual particles, which equaled 0 before the explosion, can you see where to go form here?
 

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 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
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

Conservation of Momentum of Rocket Exploding after Takeoff
Replies
5
Views
2K
Ambiguous question on momentum and how it works...
Replies
13
Views
1K
Find second object's velocity in relativity
Replies
2
Views
1K
Conservation of Momentum (Explosion Kinematics)
Replies
15
Views
2K
Momentum: instantaneous or average?
Replies
9
Views
1K
Finding two objects velocity after an elastic collision
Replies
10
Views
4K
An exploding cannon shell
Replies
4
Views
721
Is my logic right for the answer to this inelastic car collision question?
Replies
3
Views
7K
Physics 12 vector (sin law, cos law) problem
Replies
4
Views
2K
Kinetic energy and momentum in an elastic collision
Replies
22
Views
3K

Hot Threads

Recent Insights

Back
Top