Question

A ballon of mass 10 kg is raising up with an acceleration of 20 m/sec inverse .if a mass of 4 kg is removed feom the ballon its acceleration between

Answer 1

using formula
m = 2Ma/g+a
so 4=2*10*a/10+a
40+4a=20a
16a=40
a=40/16=10/4=2.5.