Skip to content

Menu

Game modes

Account

← Physics
GK QUESTION#3052

If the speed of an object of fixed mass is tripled, how does its classical kinetic energy change?

  1. AIt becomes 9 timesCorrect answer
  2. BDoubles
  3. CQuadruples
  4. DIncreases fivefold
Show AnswerHide Answer

Answer

A. It becomes 9 times

Show ExplanationHide Explanation

Explanation

At fixed mass, kinetic energy is proportional to speed squared. Replacing speed v by 3v multiplies mv²/2 by 3² = 9, so the kinetic energy becomes nine times its original value.

Sign in to report a question issue

Explore this topic

A force of 8 N acts on an object and produces a displacement of 3 metres in the…A 40 kg student gains 5 m in height in 20 s. What is the average mechanical power…Mechanical energy primarily consists of how many types?