Use Newton’s first law of motion to make a claim about why air bags in cars are important during head-on collisions. Summarize the motion of a passenger during a collision with and without an airbag to support your claim and explain your reasoning.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up