A bullet of mass 5 x 10^-5 has te velocity of 200 m/s, kinetic energy of bullet is:
Correct answer: D. none of these
- A. 100 J
- B. 1000 J
- C. 10 J
- D. none of these
Explanation
Kinetic energy = ½ mv^2 Mass = 5x10^-5 Velocity = 200 K.E = ½ (5x10^-5) (200^2) K.E = ½ (0.00005) (40000) K.E= 2/2 K.E= 1 Since the answer is 1 and none of the option matches this thus D is the correct option
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About Kinetic Energy
Kinetic energy is the energy of motion, given for a nonrelativistic object by K = ½mv², so it depends on mass and the square of speed. Questions connect kinetic energy with work through the work energy theorem, calculate changes in kinetic energy, and distinguish it from momentum and potential energy.
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