Question: please solve both 54. A skateboarder, with an initial speed of 2.0 m/s, rolls virtually frictionfree down a straight incline of length 18 m at

please solve both

54. A skateboarder, with an initial speed of 2.0 m/s, rolls virtually frictionfree down a straight incline of length 18 m at 3.3 seconds. At what angle theta is the incline oriented above the horizontal? 58. A block is given an initial speed of 4.5 m/s up a 22degree frictionless inclined plane. (a). How far up the plane will it go before it turns around? (b). How much time elapses before it returns to its starting point

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