The power associated with the work done by the frictional force is [ Select ] [\

Question

The power associated with the work done by the frictional force is                            [ Select ]                       ["negative", "positive", "zero"]         .

The power associated with the work done by the gravitation force is                            [ Select ]                       ["positive", "negative", "zero"]         .

The power associated with the work done by the normal force is                            [ Select ]                       ["positive", "negative", "zero"]         .

Explanation / Answer

since frictional force is opposite to the free fall

then Work Done is negative

so The power associated with the work done by the frictional force is NEGATIVE

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Work Done by gravitational force is positve

so Power is POSITIVE

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Work DOne by Normal Force = m g and this is POSITIVE

so The power associated with the work done by the normal force is POSITIVE

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