Question: Please explain details 1. A particle is moving along a horizontal line, so that at any time t, its position is given by: s (

Please explain details

1. A particle is moving along a horizontal line, so that at any time t, its position is given by: s ( 1) = 21- 7+ + 41+ 3, 120 a) Calculate expressions for the velocity and acceleration of the particle. b) When is the particle at rest? c) When is the acceleration positive? d) Is the particle travelling toward or away from the origin at t=1s

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