Find the time `t_0` when x-coordinate of the particle is zero.
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B, C, D
`8.25 s` (b) Total displacement =`4+4-16-32-16=-56 m` This is also equal to `x_f-x_i=-46-10=-56 m` Total distance=`4+4+16+32+16=72 m` Total time =`16s` Now, average velocity=total displacement/total time ` = -56/16=-3.5 m//s` average speed =`("total distance")/("total time")` `=72/16=4.5 m//s` (c) Average acceleration=`(Delta v)/(Delta t)` `=(v_f-v_i)/(Delta t)=(v_(8 sec)-v_(2 sec))/(8-2)` `=(-8-4)/6=-2 m//s^2`
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Knowledge Check
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D
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