Question 15 (1 point) A curling rock of mass 20 kg is sliding along a frictionless ice surface when it strikes a rock half its mass, giving the rock an instantaneous acceleration of 8.0 m/s2 [W]. According to Newton's Third Law, the 20 kg rock will experience an acceleration of 18 m/s2 [W] 4 m /s 2 [ W ] 8 m/s2 [E] 4 m/s2 [ E ]