If you are riding on a train that speed past another train moving in the same direction on an adjacent track, it appears that the other train is moving backward. Why?
Answer to relevant QuestionsIf you stand motionless under an umbrella in a rainstorm where the drops fall vertically, you remain relatively dry. However, if you start running, the rain begins to hit you legs even if they remain under the umbrella. Why?A projectile is launched at an angle of 30o to the horizontal with a speed of 30m/s. How does the horizontal component of its velocity 1.0s after launch compare with its horizontal component of velocity 2.0s after launch?(a) A skier is accelerating down a 30.0o hill at 1.80/s2 (Fig. 3-48), what is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and ...When you are running and to stop quickly, you must decelerate quickly.(a) What is the origin of the force that causes you to stop?(b) Estimate (using you own experience) the maximum rate of deceleration of a person running ...When you stand still on the ground, how large a force does the ground exert on you? Why doesn’t this force make you rise up into the air?
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