CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Units and Dimensions

If torque is ...

Question

If torque is a vector quantity then why torque =I alpha isn't a cross product?

Open in App

Solution

Hi,

Its true that torque is a vector quantiy. It is not neccessary that a vector quantity must be written in cross product.
In vector form it can be written as
$\vec{τ} = I \vec{α}$

Suggest Corrections

thumbs-up

0

Similar questions

Is torque is a scalar or vector quantity?

Q. Match List I with List II from the combinations shown.
List - I
a)Addition of vectors
b)dot product
c) cross product
d) subtraction of Vectors
List - II
e)relative velocity
f)resultant velocity
g)work done
h) torque vectors
The correct match is

Q. Torque, like angular velocity and angular acceleration, is a vector quantity. Most precisely, it is the cross product of the displacement vector,

r

, from the axis of rotation to the point where the force is applied, and the vector for the applied force,

F

T = r \times F

To determine the direction of the torque vector, use the right-hand rule, curling your fingers around from the

r

vector over to the

F

vector. In the example of lifting the lever, the torque would be represented by a vector at

0

pointing out of the page.

A student exerts a force of

50 N

on a lever at a distance

0.4 m

from its axis of rotation. The student pulls at an angle that is

60^{o}

above the lever arm. What is the torque experienced by the lever arm?

Q. If torque acting on a system is zero, the quantity that remains constant is

¯ F

is the force and

¯ r

is the radius vector, then the torque is :

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Physical Quantities

PHYSICS

Watch in App

explore_more_icon

Explore more

Units and Dimensions

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon