Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
jahnavi
Group Title
Work done on a body is a vector quantity? True or False?
 one year ago
 one year ago
jahnavi Group Title
Work done on a body is a vector quantity? True or False?
 one year ago
 one year ago

This Question is Closed

Qasim_Ahmed Group TitleBest ResponseYou've already chosen the best response.0
true my dear caouse it calculated by \[W = F \times X \] when both force and the distance X are vectors and as you know multiplying a vector by a vector gives an other vector which is normal on both of them .. greeting mate
 one year ago

gleem Group TitleBest ResponseYou've already chosen the best response.0
Sorry but work is a scalar quantity. there are two types of vector "multiplications" Dot or scalar product and cross or vector product.
 one year ago

jahnavi Group TitleBest ResponseYou've already chosen the best response.0
I think i agree with gleem that work is a scalar quantity,but i did not undustand the second half of the ans.
 one year ago

gleem Group TitleBest ResponseYou've already chosen the best response.0
The dot production is equal to the product of the magnitude of the two vectors being multiplied times the cosine of the angle between them. It is thought of as the projection of the first vector in the direction of the second times the magnitude of the second. In the case of work it is the projection of the force in the direction of the displacement times the displacement. The vector product is the product of the magnitudes of the vectors times the sine of the angle between them with the result being a vector of this magnitude and point perpendicular to the first two vectors with a direction which is found by using your right hand pointing your fingers in the direction of the first vector rotating your fingers in to the second vector with you thumb pointing in the direction of the product.dw:1356704388046:dw Example of cross product is torque ie L= F x R where F is a force and R is a displacement form the point the force is applied to the point about which the force is pivoting.
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.