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

The correct option is A 49 jouleFrictional force on the body is F=μ mg=0.2×5×9.8=9.8N Distance covered is d=5m .As work done is F.d=9.8×5=49 jou ...

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Standard XII

Physics

Relation between Work Done and PE

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

49 joule

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4.9 joule

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0.9 calorie

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4.9 calorie

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Solution

The correct option is A 49 joule
Frictional force on the body is $F = μ m g = 0.2 \times 5 \times 9.8 = 9.8 N$
Distance covered is $d = 5 m$ .
As work done is $F . d = 9.8 \times 5 = 49 j o u l e$

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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

The correct option is A 49 jouleFrictional force on the body is F=μmg=0.2×5×9.8=9.8NDistance covered is d=5m.As work done is F.d=9.8×5=49 joule

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

The correct option is A 49 joule
Frictional force on the body is $F = μ m g = 0.2 \times 5 \times 9.8 = 9.8 N$
Distance covered is $d = 5 m$ .
As work done is $F . d = 9.8 \times 5 = 49 j o u l e$