Question 7: Find the dimensions of kinetic energy.
The expression for kinetic energy is given by
To find the dimensions of K-E on the left, we should find the dimensions on right.
Dimensions for m = [M]
As v is measured in ms-1, therefore, dimensions of v = [L]/ [T]
Therefore, dimensions on RHS = [M][L2]/[T2] = [ML2T-2] —– (Z)
= Dimensions on LHS
Thus, equation (Z) gives the dimensions of KE.