A balloon is waiting to take off. As seen in the figure below, the balloon's basket sits on
a platform which rests on the ground. The
balloon is pulling up on the basket, but not
hard enough to lift it off the platform.
balloon
platform
basket
ground
What is the free-body diagram for the plat-
form? Some parallel vectors are offset hori-
zontally for clarity.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation