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An athlete is running backwards. Their foot strikes the ground. There is a ground reaction force (which is directed up) and a friction force (which
An athlete is running backwards. Their foot strikes the ground. There is a ground reaction force (which is directed up) and a friction force (which is directed backward). The ground reaction force is 1,200N and the friction force is 444N. Calculate the resultant force and the angle of the resultant force. (Hint: This is similar to sample problem 1.2 on page 35. This is going to take a little trig.)
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