First you want to turn that 5lbs into a force using the equation:
Weight(N) = mass(kg) × gravity(m/s^2)
That equation is called the weight force equation.
The conversion number for pounds to kilograms is 2.2 so to find how many kg are in 5lbs you divide 5 by 2.2 to get 2.27kg
Then we multiply 2.27kg by 9.81m/s^2 to get 22.30N
So, we can conclude that a force of 5lbs is greater than a force of 10N