In 2.0 s, a particle moving with constant acceleration along the x axis goes from x = 10 m to x = 50 m. The velocity at the end of this time interval is 10 m/s. What is the acceleration of the particle?
A. +15 m/s2
B. +20 m/s2
C. ?20 m/s2
D. ?10 m/s2
E. ?15 m/s2
Answer: D
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