Can someone help with this physics question PLEASE?

  • Thread starter Thread starter emlekarc
  • Start date Start date
  • Tags Tags
    Physics
AI Thread Summary
To find the direction when adding two vectors, it's essential to visualize them in a horizontal plane, ensuring they are not directed upwards. The angles should be clearly defined, such as one vector at 65 degrees to the right and another at 74 degrees to the left. A diagram is recommended, where the first vector is drawn as an arrow with its tail at the start, and the second vector is appended at the tip of the first. This method, known as the "head to tail" approach, allows for accurate addition of multiple vectors by extending the total vector from the first tail to the last tip. Understanding these principles can help avoid common mistakes in vector addition.
emlekarc
Messages
27
Reaction score
0
I'm confused on how you find the direction when adding two vectors?
 
Last edited:
Physics news on Phys.org
Please show your working.

I take it both angles are in the horizontal plane - i.e. they are not pulling upwards at all?
How are these angle defined?

i.e. is one guy pulling 65deg to the right and the other 74deg to the left of the mule's facing?
A diagram would help here.
 
draw one vector as an arrow with its tail at the start; draw the second vector as an arrow with its tail at the first one's tip (but keep the arrow pointed along the actual vector's direction). If you have several vectors to add, just keep appending them like that, nexttail-to-lasttip. The total vector extends from first tail to the last tip.
 
Oh you've edited the question so my reply stops making sense :(
To the new questions: what lightgrav says ... add the vectors "head to tail".
See:

I was guessing you knew this - and was working on common mistakes people make.
 
Last edited by a moderator:
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggle to understand the concept of the question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Handling two SHMs in different directions
Replies
18
Views
916
Another rotation problem -- Acceleration of a ring rolling on a surface
Replies
1
Views
722
Airplane Vector Problem: Drawing the diagram
Replies
10
Views
2K
Best Egg Drop Contest Shock Absorber?
Replies
1
Views
732
Loop equations for this battery-resistor circuit
Replies
48
Views
2K
Suvat vector versus the scalar form
Replies
44
Views
4K
Coupled pendulum-spring system
Replies
3
Views
821
Solving for relativistic velocity using Newtonian physics
Replies
2
Views
1K
Textbook 'The Physics of Waves': Calculating Work Done by Force
Replies
2
Views
874
Physics Exam Preparation: General question about auxiliary quantity and linearization of a function in physics
Replies
27
Views
1K

Hot Threads

Recent Insights

Back
Top