1. A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 836 N. As the elevator moves up, the scale reading increases to 936 N, then decreases back to 836 N. Find the acceleration of the elevator. 2. The instruments attached to a weather balloon have a mass of 5.0 kg. The balloon is released and exerts an upward force of 98 N on the instruments. What is the acceleration of the balloon and the instruments? After the balloon has accelerated for 10 s, the instruments are released. What is the velocity of the instruments at the moment of their release? For the first one, I don't understand what it means by "increases to 936 N". Thanks for any help.