B. A girl on a bar is suspended motionless from the ceiling by two ropes. Diagram the forces acting on the combination of girl and bar.

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

Contains chemical energy. a. heat b. light c. natural gas