Jaret (mass 60kg) is running forward with the football at 6.0m/s when dexter (mass 120kg) tackles him head on with a velocity of 4.0m/s just before impact. dexter grabs jaret in a tight grip and they slam to the ground, where the coefficient of friction between the uniforms and the astroturf is 0.3.
(a) which way do they slide?