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

Question

The vector position of a particle varies in time according to the expression r rightarrow = 9.00 i^ - 5.20t2 where r rightarrow is in meters and t Is In seconds. Find an expression for the velocity of the particle as a function of time. (Use any variable or symbol stated above as necessary.) v rightarrow = m/s Determine the acceleration of the particle as a function of time. (Use any variable or symbol stated above as necessary.) a rightarrow = m/s2 Calculate the particle's position and velocity at t = 4.00 s. r rightarrow = m v rightarrow = m/s

Explanation / Answer

a)-13.6t j m/s

b)-13.6 j m/s2

c)r = 6.2 i - 170 j m

v= -68j m/s

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