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An engine can pull 500 metric ton load up an inclinedplane rising 1 in 100 with a speed of 10 ms. Thefrictional force offered by the plane is 2000 N. Whatis the power of the engine?Given: 1 metric ton = 103 kg and g = 9.8 m s- |
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Answer» Net upward force in pulling the engine up (f) = mg sinθ+ frictional forcewhere m is the mass of the body = 500×100 = 50000 kgg is the acceleration due to gravity.sinθ= 1/100frictional force = 2000 NOn substituting the value , we getf = 51000Npower = force . distance/ time = force . velocitypower = 51000 . 10 = 510000 watt = 5.1×10^5watt answer is 510KW |
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