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Our sun orbits around the centre of our galaxy (the Milky Way) once every 2.5 x 108 years. The radius of the sun’s orbit about the centre of the galaxy is approximately 3.15 x 1020 m. The sun has...

A favourite swimming hole includes a rope swing from an elevated landing. The boy swings down and releases with a velocity of vf at the bottom of the swing. Use Energy, then Dynamics to determine...

John and Barry are pulling on a fence post with ropes while their friend Pat uses a chainsaw to share it at ground level. John applies a force of 75.0 N [40 degrees] on one rope while Barry applies...

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