don't copy Q13. A rain drop falling vertically under gravity gathers moisture from the atmosphere at a rategiven byam = kt?, where m is the instantaneous mass, t is time and k is a constant. Thedtdvequation of motion of the rain drop is mdm+ vdt= mgdtIf the drop starts falling at t=0, with zero initial velocity and initial mass m,(m, = 2 gm, k =12 gm/s' and g =1000 cm/s ), the velocity v of the drop after onesecond is(а) 250 ст/ s(b) 500 ст/ s(с) 750 ст/ s(d) 1000 ст/ s

Given, dmdt= kt2mdvdt+vdmdt= mgAt t=0m0= 2 gmk= 12 gm/s2g= 1000 cm/s2

A rain drop falling vertically under gravity gathers moisture from the atmosphere at a rate dm given by. kt2, where mn is the instantaneous mass, t is time and k is a constant. The dt %3D dv equation of motion of the rain drop is m- dt dm = mg dt If the drop starts falling at t=0, with zero initial velocity and initial mass m ( m, = 2 gm, k =12 gm/s' and g =1000 cm/s), the velocity v of the drop after one second is (a) 250 cm/s (b) 500 cm/s (c) 750 cm/s (d) 1000 cm/s

A rain drop falling vertically under gravity gathers moisture from the atmosphere at a rate dm given by. kt2, where mn is the instantaneous mass, t is time and k is a constant. The dt %3D dv equation of motion of the rain drop is m- dt dm = mg dt If the drop starts falling at t=0, with zero initial velocity and initial mass m ( m, = 2 gm, k =12 gm/s' and g =1000 cm/s), the velocity v of the drop after one second is (a) 250 cm/s (b) 500 cm/s (c) 750 cm/s (d) 1000 cm/s