Consider the diagram shown at right, which has a 15 V battery connected to two resistors valued at R1 = 30. Ω and R2 = 20. Ω and an ammeter. Calculate:
a the equivalent resistance
b. the power dissipated across R2
c. the reading made by the ammeter

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.