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Work, Energy, and Power — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power1 Mark
MCQ
The relationship between force and position is shown in the figure (in one dimensional case). Work done by the force in displacing a body from
X = 1cmto X = 5cmis:
  • A
    700 ergs
  • B
    70 ergs
  • C
    60 ergs
  • D
    20 ergs
✓

Answer

  1. 60 ergs

Explanation:

Work is area under the curve.

So In = In1​ + In2​ + In3​ + In4​

In1 ​= arandaundandr  A1​BCM2​

In2​ = arandaundandr M2​DEF3​

In3​ = arandaundandr F3​GHI4​

In4​ = arandaundandr I4​JKL5

In1 ​= 10 × 1 = 10ergs

In2​ = 20 × 1 = 20ergs

In3 = −20 × 1 = −20ergs

In4​ = 10 × 1 = 10ergs

In = In1​ + In2 + In3​ + In4​ = 10 + 20 − 20 + 10 = 20ergs

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