During a process in which 1556 foot-pounds of positive work is done by a closed stationary system, the internal energy decreases by 5 British thermal units. The heat transfer is most nearly:. 1. 10 Btu added.
2. 3 Btu extracted.
3. 3 Btu added.
4. 7 Btu extracted.
5. 7 Btu added.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.