The formula F = m(v_2 - v_1)/t gives the force F in newtons (N) exerted on an object to accelerate it from v_1 to v_2 in t seconds. A man of mass 80 kg takes 3 seconds to fall 7.36 metres from the top of a landing craft to the surface of the moon. He lands at 4.9 m/s. (a) Determine the force on the man on the moon. (b) If the force on the man on earth for a 1.2 metre fall, landing at the same speed, was 784 N, determine the time it would take for the man to fall.