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A football player kicks a field goal from a distance of 45 m from the goalpost.
The football is launched at a 35° angle above the horizontal.
What initial velocity is needed so that the football just clears the goalpost crossbar that is 3.1 m above the ground?
Ignore air resistance and the dimensions of the football
A car of mass 800 kg is pulling a trailer of mass 300 kg up the slope of angle ? to the horizontal where sine ? = 1/200. Resistance to motion (apart from gravity) is 1.5 N per kg o
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UNIT: SI unit of force is Newton (N).
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