## Question

###### 4.Arod of length Lo = 1.50 m moves along the horizontal direction: The rod makes an angle 80 25.09 with the x axis of its own moving reference frame S' . (a) How fast will the rod need to be traveling relative to an observer at rest to measure and angle of 0 71.08 with the axis x of the rest reference frame S? (b) Ifthe rod has a mass of 1.00 kg, then how much work would have been done to accelerate the rod to this speed from an initial speed of 9.00 X 106 m/s?

4.Arod of length Lo = 1.50 m moves along the horizontal direction: The rod makes an angle 80 25.09 with the x axis of its own moving reference frame S' . (a) How fast will the rod need to be traveling relative to an observer at rest to measure and angle of 0 71.08 with the axis x of the rest reference frame S? (b) Ifthe rod has a mass of 1.00 kg, then how much work would have been done to accelerate the rod to this speed from an initial speed of 9.00 X 106 m/s?

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