help The vector position of a particle varies in time according to the expressio

Question

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The vector position of a particle varies in time according to the expression r rightarrow = 6.20 i - 6.80t2 j 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 = 5.00 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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