Question

an unknown quantity x multiplied by velocity equals power. recognize x, using method of dimensions

Answer 1

p =work/time=1/2m
${0.5m {v}^{2} } \div t$

Answer 2

Answer: Force 'F'

Explanation:

x*v=P

putting dimensions

$[M^{1} L^{3} T^{-3}]= x * [L^{1}T^{-1}]$

$x=[M^1L^2T^{-2}]$

this is dimention of force so x=Force