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(a) The displacement of a particle (in meter) is given by d= (20+3t^3)(i)+(4t^2-t-15)(j).What is its distance (use polar format) from the origion at t =2.00s.
(b) what is its velocity and (c) its acceleration when t=2.00s? ( both in polar formate)
Bob throws a 500 g rock at 25 m/s, moving his hand through 1.0 m as he accelerates it from rest. Write Newton's 2nd Law for Bob and the rock
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