Will the particles come closer ?

A particle moves according to the equation t= sqrtx +3 , where will be the particle come to the rest for the first time

A particle moves according to the equation t=sqrt(x)+3 ,where will be the particle come to the rest for the first time.

If an alpha- particle comes closure to a proton, it ………………. Proton.

(A) : The centre of mass of a two particle system lies on the line joining the two particles, being closer to the heavier particle. (R ) : Product of mas of one particle and its distace from centre of mass is numerically equal to product of mass of other particle and its distance from centre of mass.

If a particle moves alonga straight line by S = 4t^(2) - 8t + 3 and the time at which the particle comes of rest is 't' seconds then '2t' is

The displacement s of a particle travelling in a straight line in t seconds is given by s=45t+11t^(2)-t^(3) . Find the time when the particle comes to rest.