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Test Friction

You are maroo...

Question

You are marooned on a frictionless horizontal surface and cannot exert any horizontal force by pushing against the surface. How can you get off ?

A

By jumping

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B

By spitting or sneezing or blowing air from your mouth

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C

By rolling your body on the surface

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D

By running on the plane

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Solution

The correct option is B By spitting or sneezing or blowing air from your mouth
by doing things given in (B) you will create a repulsive force by considering conservation of momentum and create an acceleration /.
Ans is B

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