Q.

If a force F→=4i^+5j^  causes a displacement  s→=3i^+6k^, work done is

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answer is 12.

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Detailed Solution

W=F→.s→=(4i^+5j^+0k^).(3i^+0j^+6k^)=4×3=12 units
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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Best Books for NEET
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