Find the total impulse acting on a body up to 8 seconds from the F−t graph shown.
A
20N
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B
26N
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C
14N
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D
40N
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Solution
The correct option is B26N Impulse = Area under the F−t graph. From the given graph Total area = Area of the trapezium (from t=0tot=4s) − Area of the triangle (from t=4stot=8s) ∴Total area=12×(2+4)×10−12×4×2=26N