Question

A is a particle, velocity of this is 60 km/hour and B is a particle ,velocity of this is 70 km/hour and both particles are going in the same direction. When these particles will hit one another?​

Answer 1

Answer:

They will hit each other after a time =

(initial distance between the bodies when counting of time starts) /10

Explanation:

At the moment of of collision the bodies will have covered distances Sa and Sb in a time T (say). Then,

Sa = 60T and Sb = 70T (using s=vt)

Obviously, Sb > Sa.

If S is the initial separation between the bodies,

S = Sb - Sa

or S = 70T - 60T

or S = 10T

or T = S/10

ie T = (initial distance between the bodies when counting of time starts) /10