Question

A force of 2î + 3ĵ + 4k̂ n, acts on a body for 4 second, produces a displacement of (3î + 4ĵ + 5k̂)m. The power used is

Answer 1

first we have to calculate work done..so
2×3+3×4+4×5=38
then divide 38 by 4..u will get the answer