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?

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)