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A body of mass m = 3.513 kg is moving along the x-axis with a speed of 5.00 ms−1. The magnitude of its momentum is recorded as

  1. 17.6 kg ms-1
  2. 17.565 kg ms-1
  3. 17.56 kg ms-1
  4. 17.57 kg ms-1
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Momentum, p = m \(\times\) v

= 3.513\(\times\)5.00 = 17.565 kg m/s

= 17.6 kg m/s

Here number of significant digits in m is 4 and in v is 3, so, p must have minimum (which is 3) significant digit.

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