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Relation between Work Done and PE

Block A and B...

Question

Block A and B have masses of 2kg and 3kg respectively. The ground is smooth. Pis an external force of 10N.The force exerted by B on A is

A

4N

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B

6N

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C

8N

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D

10N

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Solution

The correct option is B
6N

N is the force exerted by B on A

10 - N = 2a .....(1)

N = 3a ......(2)

From (1) and (2) a = 2 $m s^{- 1} \Rightarrow N = 6 N$

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