As indicated by the derivation, the principle of work and energy is valid for observers in any inertial reference frame. Show that this is so, by considering the 10-kg block which rests on the smooth surface and is subjected to a horizontal force of 6 N. If observer A is in a fixed frame x, determine the final speed of the block if it has an initial speed of 5 m/s and travels 10 m, both directed to the right and measured from the fixed frame. Compare x′ the result with that obtained by an observer B, attached to the axis and moving at a constant velocity of 2 m/s relative to A.

Transcribed Image Text:

6 N- B 2 m/s 5 m/s -X 10 m