Exercise 7.5
Does the kinetic energy of an object which moves with constant velocity change with its position? In these examples, you notice that when the stretched band or the bent
Not cross-checked
NCERT prints no numerical answer for this exercise, so this working has not been cross-checked against the book.
NCERT’s answer
No
No — it stays the same.
\(\displaystyle K = \frac{1}{2}mv^{2} \) depends only on the mass and the speed, never on where the object is.
Constant velocity means \(\displaystyle v \) does not change, so \(\displaystyle K \) does not change as the object moves from place to place.
Seen through the work-energy theorem: with the velocity constant, no net work is being done on it, so there is no change in its kinetic energy.