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a-t Graph

A force shown...

Question

A force shown in the F-x graph is applied to a 2 kg block horizontal as shown in the figure. The change in kinetic energy is

A

15 J

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B

20 J

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C

25 J

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D

30 J

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Solution

The correct option is B 20 J
Change in kinetic energy $Δ k = \frac{1}{2} \times 8 \times 5 = 20 J$

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