If acceleration due to gravity is 10 m/sec2, then the potential energy of a body of mass 1 kg kept at a height of 5 metres is

  1. 50 J
  2. 500 J
  3. 100 J
  4. 5 J

Answer (Detailed Solution Below)

Option 1 : 50 J
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Detailed Solution

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CONCEPT:

  • Potential energy: The energy of an object due to its position is called potential energy. It is denoted by PE.
    • Mathematically potential energy can be written as 
    • P.E of object =  m g h

​​Where m = mass of an object, g = acceleration due to gravity, and h = height

CALCULATION:

We are given,

m = 1 kg, g = 10 m/s2, h = 5 metres

PE = 1 × 10 × 5 = 50 J

Hence option 1 is correct.

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