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Class 9 Physics (India)

Course: Class 9 Physics (India) > Unit 4

Lesson 2: Energy
Science
Class 9 Physics (India)
Work & Energy
Energy
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Using the kinetic energy equation

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Problem

A cannon launches a 3, point, 0, start text, k, g, end text pumpkin with 110, start text, J, end text of kinetic energy.
What is the pumpkin’s speed?
Round answer to two significant digits.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start fraction, start text, m, end text, divided by, start text, s, end text, end fraction
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