A body is pulled through a distance of 5m on a rough surface- If the mass of the body is 5kg and - - 0-2- then the heat energy developed as a result of friction is

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Standard XII

Physics

Second Law of Motion

A body is pul...

Question

A body is pulled through a distance of 5m on a rough surface. If the mass of the body is 5kg and $μ = 0.2$ , then the heat energy developed as a result of friction is

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Solution

Kinetic energy acquired by the body = Total work done by the body - friction work
K.E =( $F \times S$ ) - $μ m_{g} s$

= $25 \times 10 - 0.2 \times 5 \times 10 \times 10$
=250-100
=150J

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A body is pulled through a distance of 5m on a rough surface. If the mass of the body is 5kg and μ=0.2, then the heat energy developed as a result of friction is

Kinetic energy acquired by the body = Total work done by the body - friction workK.E =(F×S) - μmgs =25×10−0.2×5×10×10 =250-100 =150J

A body is pulled through a distance of 5m on a rough surface. If the mass of the body is 5kg and $μ = 0.2$ , then the heat energy developed as a result of friction is

Kinetic energy acquired by the body = Total work done by the body - friction work
K.E =( $F \times S$ ) - $μ m_{g} s$

= $25 \times 10 - 0.2 \times 5 \times 10 \times 10$
=250-100
=150J