Two blocks A and B of masses 8kg and 2kg respectively, lie on a horizontal frictionless surface as shown in the figure. They are pushed by a horizontally applied force of 15N. The force exerted by B on A is
A
1.5N
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B
3.0N
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C
4.5N
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D
6.0N
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Solution
The correct option is B3.0N Fnet=Manet 15=10×a⇒1510=a⇒a=1.5m/s2 15−N=ma !5−N=8×1.5 15−12=N N=3.0n