Force exerted on the body,\(\text F\) = \(-\hat{i}+2\hat j+3\hat k\) \(\text N\)
Displacement, \(s\) = \(4\,\hat k\,m\)
Work done, \(W\) = \(\text F.s\) = (\(-\hat{i}+2\hat j+3\hat k\)) . (\(4\,\hat k\)) = \(0+0-3\times 4\) = \(12 \,\text J\)
Hence, \(12 \,\text J\) of work is done by the force on the body.
Find the mean and variance for the following frequency distribution.
Classes | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
Frequencies | 5 | 8 | 15 | 16 | 6 |
Read More: Work and Energy