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The vector position of a particle varies in time according to the expression r with arrow...

The vector position of a particle varies in time according to the expression r with arrow = 7.40 î − 5.00t2 ĵ where r with arrow is in meters and t is in seconds.

(a) Find an expression for the velocity of the particle as a function of time. (Use any variable or symbol stated above as necessary.) v with arrow = m/s

(b) Determine the acceleration of the particle as a function of time. (Use any variable or symbol stated above as necessary.) a with arrow = m/s2

(c) Calculate the particle's position and velocity at t = 2.00 s. r with arrow = m v with arrow = m/s

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