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Q5.11: NCERT Physics - Part 1 WORK, ENERGY AND POWER 5.11 Solution: A body constrained to move along the z-axis of a coordinate…
A body constrained to move along the z-axis of a coordinate system is subject to a constant force F given by F = -i + 2j + 3k N, where i, j, k are unit vectors along the x-, y- and z-axis of the system respectively. What is the work done by this force in moving the body a distance of 4 m along the z-axis?
Step-by-Step Verified Solution
**Answer:** W = 12 J
**Step-by-Step Explanation:**
Displacement d = 4k m.
Work W = F � d = (-i + 2j + 3k) � (4k) = 3 _ 4 = 12 J.
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