Question

11.
The frictional force of the air on a body of mass Ikg falling with an acceleration of 9 5m per second² is
a/9.8N
b) 9.5 N
c) 0.3 N
a) 9.8 N​

Answer 1

Answer:

From FBD, ma=mg−f

or f=m(g−a)=0.25(9.8−9.2)

take g=9.8m/s

Answer 2

Answer:

From free body diagram , ma=w-f , f=m(g-a)=0.25(9.8-9.2)