SAT Math Multiple Choice Question 348: Answer and Explanation

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Test Information

Question: 348

3. Kinetic energy is the energy of motion. The equation represents the kinetic energy in joules of an object with a mass of m kg traveling at a speed of v meters per second. What is the kinetic energy in joules of an unmanned aircraft with a mass of 2 × 103 kg traveling at a speed of approximately 3 × 103 meters per second?

  • A. 9 × 59
  • B. 9 × 108
  • C. 9 × 109
  • D. 1.8 × 1010

Correct Answer: C

Explanation:

C

Difficulty: Easy

Category: Passport to Advanced Math / Exponents

Strategic Advice: You do not need a calculator to answer this question-just use the rules of exponents. Remember, when raising a power to a power, you multiply the exponents.

Getting to the Answer: Substitute the values given in the question into the formula. Then simplify using the rules of exponents.

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