Question

What should be the value of force so 1 kgmass will be in eqilibrium?

Answer 1

Explanation:

The normal reaction is the force exerted by an object to counteract the weight/force exerted by another object in contact with it. Therefore it's magnitude will be same as that of the force exerted and it will be perpendicular to the surface of contact of the two bodies

Answer 2

The same force that gives the standard 1 kg mass an acceleration of $1.00\ \rm{m/s^2}$ acts first on body A, producing an acceleration of $0.640 \ \rm{m/s^2}$.