Abrave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 780 n on him. the mass of the losing player plus equipment is 86 kg, and he is accelerating at 2.6 m/s2 backward. randomized variables f = 780 n m1 = 86 kg m2 = 118 kg a = 2.6 m/s2 show answer no attempt 50% part (a) what is the magnitude of the force of friction, in newtons, between the losing player's feet and the grass as he slides backwards?

Three archers each fire four arrows at a target. joe’s four arrows hit at points 10 cm above, 10 cm below, 10 cm to the left, and 10 cm to the right of the center of the target. all four of moe’s arrows hit within 1 cm of a point 20 cm from the center, and flo’s four arrows hit within 1 cm of the center. the contest judge says that one of the archers is precise but not accurate, another archer is accurate but not precise, and the third archer is both accurate and precise. which description applies to which archer? explain

What will a positive and a negative charge do if they are separated from each other?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.