Which of the following is an example of Newtons second law of motion? (2 points) Caties skateboard hits a curb and she falls forward onto the grass. A tissue and a rock are dropped from a ladder. The rock exerts a greater force when it hits the ground. A person stands on a chair and pushes down, and the chair pushes upwards on the person. Tires from a bike push against the road, and the road pushes back.