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Question

Fig. Shows the vertical section of a frictionless surface. A block of mass 2 kg is released from rest from position A; its KE as it reaches position C is (g=10ms2)



A

140 J

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B

180 J

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C

120 J

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D

280 J

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Solution

The correct option is A

140 J


Decrease in height: h=14-7=7 m

Also KE at C =Loss in PE=mgh=140 J


Physics

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