Question

a force of 5N acts on a body of weight 19.8N what is acceleration is produced

Answer 1

We know the gravitational force working on 1 kg mass is 9.8 N. Hence 19.8N
$= (19.8 \div 9.8)gm \: mass$
Hence the acceleration obtained by the body
$= (5 \div (19.8 \div 9.8)) = 2.5m {s}^{ - 2}$
Approximately.

Answer 2

Hope u understand the calculations yourself