Question

a force of 4kg -wt acts upon a body of mass 9.8kg . calculate the acceleration. (g =9.8m's^2)

Answer 1

here given is a weight
then force becomes mg
that is F=Mg
=4*9.8

then by using the formula
F=Ma
a=F/M
=4*9.8/9.8
=4

Answer 2

f =ma
4 × 9.8 = 9.8 × a
a =4m/s^2