Newton’s Second Law corrected the old belief that force is needed to maintain motion. This idea came from the philosopher:
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प्रश्न
An electron of mass 9 × 10−31 kg is moving with a linear velocity of 6 × 107 ms−1. Calculate the linear momentum of electron.
संख्यात्मक
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उत्तर
Mass of electron = m = 9 × 10−31 kg
Velocity of electron = v = 6 × 107 ms−1
Momentum of electron = P = ?
We know, P = mv
P = 9.1 × 10−31 × 6 × 107
P = 54 × 10−24 kg ms−1 or Ns
= 54 × 10−24 kg ms−1 Ns
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