Question

A particle of mass 1 kg is fired with velocity 50m/s

Answer 1

X= 108m.

F= 0.2u

a= 0.2u m/s2

du/dt = 0.2u

{v 25 dv/v = {10 0 0.2dt

lnv _ ln25 = _2

lnv = ln25 _2

lnv= 1.218

v= 3.59m/s

a = v du/dx = 0.2v

{3.59 25 dv = - {10 0 0.2dx

x = 25 -3.6/0.2 = 107

x = 108m