Why Is Sin A Used in the Cross Product Equation F=qvBsinA?

glueball8
Messages
345
Reaction score
1

Homework Statement



Just a general questions I don't understand. Why is it sin A in a cross product and not cos A?
I don't understand it in the equation F=qvBsinA

Homework Equations



no

The Attempt at a Solution



...
 
Physics news on Phys.org
nvm.. got it...
 

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

Difference between scalar and cross product
Replies
5
Views
1K
Can someone tell me how they did cross product?
Replies
2
Views
1K
Why are they using Cosine instead of Sine for Cross Product?
Replies
2
Views
1K
Torque on a Circular Current Loop under a Misaligned Magnetic Field
Replies
1
Views
939
Solution to the Two-Body Problem: Cross-Product and Dot-Product Integration
Replies
2
Views
1K
Understanding the Relationship between Dot and Cross Products
Replies
6
Views
2K
Understanding a step in a Biot-Savart law problem
Replies
2
Views
1K
Deriving sin(a-b) trig identity using Cross Product of Unit Vectors
Replies
20
Views
8K
How do I find the intersection of the wrench's LOA?
Replies
4
Views
1K
What Is the Correct Angle Between Two Vectors If Their Cross Product Is Known?
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top