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Question

A 500kg horse pulls a caw of mass 1500kg along a level road with an acceleration of 1m/s2. If the coefficient of sliding friction is 0.2 then the horizontal force exerted by the earth on the horse is

A
300 kg-wt
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B
400 kg-wt
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C
500 kg-wt
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D
600 kg-wt
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Solution

The correct option is D 600 kg-wt
ForceonblockF=μmg+ma=0.2×1500g+1500×1=450g
Force on horse F=500a+μ×500g=150g
Totalforce=150+450=600kgwt

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