please help If an object is moving at uniform speed in a straight line, its inst

Question

please help

If an object is moving at uniform speed in a straight line, its instantaneous velocity halfway through any time interval is A) greater than its average velocity. B) less than its average velocity C) the same as its average velocity. D) half of its average velocity. E) twice its average velocity. The relationship between the velocity of a body moving along the x axis and time is given by v = 2t3 + 2t, where the units are SI units. The total distance the body travels between the times t = 2 s and t = 4 s is A) 132 m B) 144 m C) 136 m D) 120 m E) 156 m

Explanation / Answer

4) C

5) integrate v from 2 to 4

x= t^4/2 + t^2

distance = 128+16-8-4=132m

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