Question

A body with initial velocity 8 m/s moves along a
straight line with constant acceleration and travels
640 m in 40s. Find the average velocity during this
interval.​

Answer 1

Here is ur answer, u=8m/s, t=40s, d=640m . so by the formula s= ut+1/2at^2 we will find acceleration . 640= 8×40+1/2×a×40×40= 640-320= 800a . 320/800=a. therefore a= 0.4m/s^2 . then find final velocity. v= u +at. v= 8+0.4×40 .v=24m/s. then average velocity = 640/40 =16m/s. THANKYOU

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Answer 2

Explanation:

average velocity is displacement by total time taken .so I think it will be 640 by 40 that is 16 . so I think the answer is 16