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Use the definition to find an expression for the instantaneous velocity of an object moving with rectilinear motion according to the given function relating s

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Use the definition to find an expression for the instantaneous velocity of an object moving with rectilinear motion according to the given function relating s (in ft) and t (in s). Then calculate the instantaneous velocity for the given value of t. s = 21- - 4t; t = 5 The expression for the instantaneous velocity of the object is The instantaneous velocity after 5 s is |fu/s

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