Questions
A uniform force of acts on a particle of mass 2 kg. Hence, the particle is displaced from to position The work done by the force on the particle is [NEET 2013)
detailed solution
Correct option is A
Given, force, F=(3i^+j^)Nr1=(2i^+k^)m and r2=(4i^+3j^-k^)m∴ s=r2-r1=(4i^+3j^-k^)-(2i^+k^)=(2i^+3j^-2k^)m∴ W=F·s=(3i^+j^)·(2i^+3j^-2k^)=3×2+1×3+0=6+3=9 JTalk to our academic expert!
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