7 why are cars with air bags safer than cars without

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7) Why are cars with air bags safer than cars without? 8) You are stranded on frozen pond and there is little friction between you and the surface. You shout to your friend for some assistance and he slides you a heavy stone that comes to rest at the base of you feet. How can you use this stone to get to safety? What are 2 different explanations for your answer? 9) How can you use a spring loaded dart gun to find the spring constant of the spring inside the dart gun. Assume you have a digital scale and a tape measure and shoot horizontally. You must use words and math. 10) A person climbs a ladder which is leaning against a wall (see diagram). As the person climbs higher, a) Explain what happens to the force of friction between the ladder and the floor. b) Explain what happens to the torque created by the person climbing the ladder. 11) Your friend says that rockets are unable to accelerate in space because there is no air for the rocket to push off of. Is your friend right or wrong? EXPLAIN 12) Why do tight rope walkers use long poles which are heavier at the ends?
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