JEE MainPhysicsUnits and MeasurementsMCQ+4 / −1
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
- A17.6 kg ms-1
- B17.565 kg ms-1
- C17.56 kg ms-1
- D17.57 kg ms-1
View written solutionFree
Correct answer: A
-
Given data
- Mass:
- Speed:
-
Formula for momentum
The magnitude of momentum is
-
Substitute the values
-
Apply significant figures
- has 4 significant figures
- has 3 significant figures
In multiplication, the result should have the same number of significant figures as the factor with the least number of significant figures.
So, the answer should be reported to 3 significant figures.
-
Match with options
- A: ✅
- B: ❌ (too many significant figures)
- C: ❌
- D: ❌
-
Final answer
The correct recorded magnitude of momentum is
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