A ice block floating in a river is pushed through a displacment d=(15m) - (12m) alon] a staight A embankment by rushing water , which exerts a force F=(210N) - (150N) on the block . how much work does the force do on the block during the displacement ?

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Solution

$D i s p l a c e m e n t i s g i v e n b y : d = 15 \hat{i} - 12 \hat{j} F = 210 \hat{i} - 150 \hat{j} W = F . d W = (210 \hat{i} - 150 \hat{j}) . (15 \hat{i} - 12 \hat{j}) W = 3150 - 1800 W = 1350 j o u l e$

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A ice block floating in a river is pushed through a displacment d=(15m) - (12m) alon] a staight A embankment by rushing water , which exerts a force F=(210N) - (150N) on the block . how much work does the force do on the block during the displacement ?

Displacement is given by:d = 15i^ - 12j^F = 210i^ - 150j^W = F.dW = 210i^ - 150j^.15i^ - 12j^W = 3150-1800W = 1350 joule

$D i s p l a c e m e n t i s g i v e n b y : d = 15 \hat{i} - 12 \hat{j} F = 210 \hat{i} - 150 \hat{j} W = F . d W = (210 \hat{i} - 150 \hat{j}) . (15 \hat{i} - 12 \hat{j}) W = 3150 - 1800 W = 1350 j o u l e$