यदि कोई वस्तु कुल चली गयी दूरी की आधी दूरी `v_(1)` वेग से तथा शेष आधी दूरी वेग `v_(2)` से तय करती है तो गति दौरान वस्तु का वेग निम्न होगा :
`v_(av)=((S//2)+(S//2))/((S//2v_(1))+(S//2v_(1)))=(2v_(1)v_(2))/(v_(1)+v_(2))`

" "_(2)n_(1)=(v_(1))/(v_(2)): :""_(1)n_(2): ………………..

(V + 1) / (V (2V + 1)) dv = - (1) / (x) dx

If |vec(V)_(1)+vec(V)_(2)|=|vec(V)_(1)-vec(V)_(2)|and V_(2) is finite, then

If |vec(V)_(1)+vec(V)_(2)|=|vec(V)_(1)-vec(V)_(2)|and V_(2) is finite, then

A car moves with speed v_(1) upto (t)/(3) time and then with speed v_(2) upto next (2t)/(3) time. Path is straight line.What is the average speed of car? " (A) (2v_(1)v_(2))/(v_(1)+v_(2)) (B) (v_(1)+v_(2))/(2) (C) (2v_(1)+v_(2))/(3) (D) (v_(1)+2v_(2))/(3)

Two sheet sheets each of length a_(1) and breadth a_(2) are used to prepare the surfaces of two right circular cylinders - one having volume v_(1) and height a_(2) and other having volume v_(2) and height a_(1)* Then,v_(1)=v_(2) (b) a_(1)v_(1)=a_(2)v_(2)a_(2)v_(1)=a_(1)v_(2)(d)(v_(1))/(a_(1))=(v_(2))/(a_(2))

Following are four different relation about displacement,velocity and acceleration for the motion of a particle in general.Choose the incorrect one (S). a) V_(av)=(1)/(2)[v(t_(1))+v(t_(2))] b) V_(av)=(r(t_(2))-r(t_(2)))/(t_(2)-t_(1)) c)r= (1)/(2)(v(t_(2))-v(t_(1))(t_(2)-t_(1)) d) a_(av)=(v(t_(2))-v(t_(1)))/(t_(2)-t_(1))

Following are four different relation about displacement,velocity and acceleration for the motion of a particle in general.Choose the incorrect one (S). a) V_(av)=(1)/(2)[v(t_(1))+v(t_(2))] b) V_(av)=(r(t_(2))-r(t_(2)))/(t_(2)-t_(1)) c)r= (1)/(2)(v(t_(2))-v(t_(1))(t_(2)-t_(1)) d) a_(av)=(v(t_(2))-v(t_(1)))/(t_(2)-t_(1))