Question 13 (1 point) Which of the following observations would be adequately explained by Newton's third law? O The Earth is held in orbit around the Sun by a gravitational force of attraction. O One skater pushes against another and both move off in opposite directions. O A car's tires slip on an ice-covered surface. O When turning a corner, a passenger in a car feels pushed against the door. Question 14 (1 point) A customer at a hardware store pushes a trolley at a constant velocity across the floor with a horizontal force of 75 N [E]. The force of kinetic friction on the trolley is O 75 N [E] OON [E] ( 75 N [W] 11951.25 N [E] Question 15 (1 point) A 60.0 kg object accelerates with a magnitude of 3.00 m/s/s. What is the magnitude of the net force acting on this object? O 63.ON 120 N O 210 N O 180 N