Problem 12–65 The v-s graph was determined experimentally to describe the straight-line motion of a rocket sled. Determine the acceleration of the sled at s = s3 and s = s4. Given: v (m/s) m vị = 20 s1 = 50 m v2 = 60 s2 = 300 m V2 s3 = 100 m $4 = 200 m d s (m)
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