General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 15)
15.
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Discussion:
21 comments Page 1 of 3.
Amit Kumar Sahu said:
1 decade ago
Impulse means change in the momentum of a body
i.e. Impulse = Ft = mv - mu
The turning effect of force about the axis of rotation is called moment of force or torque.
So they don't have any units... resulting no dimensions!!
i.e. Impulse = Ft = mv - mu
The turning effect of force about the axis of rotation is called moment of force or torque.
So they don't have any units... resulting no dimensions!!
Gajendra singh said:
1 decade ago
Due to torque?
Adebayo said:
1 decade ago
Excuse me is the unit of force the same as that of change of linear momentum. Force=ma and /\Momentum=mv-mu. Unit of force is newton(kgm/s^2) while momentum is Kgm/s. Pls are the two entitles thesame? Im really confused, kindly forward your views to me. Thank u!
Vivetha.h said:
1 decade ago
Impulse and the moment of force have identical quantites, just I need a correct explanation, how it I identified? how it is derived? any one can give me a correct explanation, if so, fast as you can possible, ok, wish you all the best, bye.
Aravind said:
1 decade ago
@Vivetha.
Impulse is the force acting on a body for a particular time.
Hence impulse is the product of impulse=f*t.
Due to impulse a moment of force occurs that is m*v.
Hence the dimensional formula for them is for impulse [M L T^-1].
AND FOR MOMENT OF FORCE IT IS Newton meter == (kgm/sec^2) *m.
Kgm^2/sec^2.
Impulse is the force acting on a body for a particular time.
Hence impulse is the product of impulse=f*t.
Due to impulse a moment of force occurs that is m*v.
Hence the dimensional formula for them is for impulse [M L T^-1].
AND FOR MOMENT OF FORCE IT IS Newton meter == (kgm/sec^2) *m.
Kgm^2/sec^2.
Vitul said:
1 decade ago
Could anybody please explain how planck's constant and angular momentum has same dimensions?
Sushant said:
1 decade ago
hv = Joule & Hence h= Joule/v(frequency) = joule*time.
Angular momentum = mvr = joule*time.
Angular momentum = mvr = joule*time.
Seema said:
1 decade ago
How the dimension of angular momentum - joule* time?
Strom said:
1 decade ago
Mvr = Mv^2(r/v).
Mv^2 has dimension of energy.
(R/v) has dimension of time.
Mv^2 has dimension of energy.
(R/v) has dimension of time.
Seema singh said:
1 decade ago
Mv^2 has dimension = MLT-1.
Energy has dimension = ML2T-2.
So, How they equals?
Energy has dimension = ML2T-2.
So, How they equals?
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