Question

Answer the question which is given in attachment.

Answer 1

$kg \: {s}^{ - 1} \: is \: the \: correct \: answer \: \: \:$
let K be the constant .
then formula for the force will be
F=kv
where F denotes force and v denotes velocity .
k=F/v
[F]=[MLT^-2]÷[LT^-1]
[F]=[MT-1] put the SI units of these quantities and u get kg/s