Answer to Question #124479 in Physics for Tangi TNT TSHIPANGA

Question #124479

a boy drags a 10kg box across a frictionless surface. the boy applies a force of 100N at an angle of 30° to the horizontal for 3 m in 5 seconds .
calculate the work done by gravity

Expert's answer

"W=mgd\\cos{30}\\\\W=(10)(9.8)(3)\\cos{30}=255\\ J"

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