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EXERCISE 3
EXERCISE 3 (a) A bullet fired from a .45 caliber pistol has a velocity of about 300 m/s and a slug with mass of about 15 grams (0.015 kg). How much kinetic energy does the bullet carry as it moves toward its target? (b) A 4-door automobile moving at 30 miles per hour has a velocity of about 15 m/s and has a mass of about 800 kg. How much kinetic energy does the automobile carry as it moves down the street? (c) If you were suddenly attacked by a rampaging wildebeest, would you rather hit it with a car or shoot it with a gun? Explain your answer. |