A passenger of mass 70 kg stands on the floor of a lift which is accelerating vertically upwards at 1.2 m s-2. Use g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2.
Find the normal reaction of the lift floor on the passenger.
State the magnitude and direction of the Newton's third-law partner to this normal reaction.