Which of the following is an example of Newton's first law of motion?
Sam's bike hits a curb and he flies over the handlebars, onto the grass.
A feather and a brick are dropped from a ladder. The brick exerts a greater force when it hits the ground.
A person sits on a chair and pushes down, and the chair pushes upwards on the person.
Tires from a car push against the road, and the road pushes back.
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