# Vector and Acceleration

** Please see the attached file for the complete problem description **

Velocity and acceleration: consider a velocity vector given in standard unit vector form in rectangular Cartesian coordinates as ____ (please see the attached file).

a. What is the acceleration at 2 seconds?

b. What is the displacement at 5 seconds?

c. What is the angle between the displacement and the acceleration at t=2.0s?

d. What is the velocity of the vector at 2 seconds?

e. What is the magnitude of the displacement at 5 seconds?

https://brainmass.com/physics/physics-measurements/vector-acceleration-567363

#### Solution Preview

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Solution:

Velocity vector v(t) = 3t4 i + 7t5/2 j + 5e2t k .....(1)

Displacement vector s(t) = âˆ«(3t4 i + 7t5/2 j + 5e2t k) dt

s(t) = 3âˆ«(t4 dt ) i + 7âˆ«(t5/2 dt) j + 5âˆ«e2t dt) k

s(t) = 3(t5/5) i + 7 x (2/7) t7/2 j + 5 (e2t/2) k

s(t) = 3t5/5 i + 2t7/2 j + 5e2t/2 k ......(2)

Acceleration vector a(t) = dv/dt = d/dt(3t4 i + 7t5/2 j + 5e2t k)

a(t) = 3x4t3 i + 7x5/2xt3/2 j + 5x2xe2t k

a(t) = 12t3 i + 35/2xt3/2 j + 10e2t k ...

#### Solution Summary

This solution involves time varying displacement, velocity and acceleration vectors. For a given velocity vector, expressions for the displacement and acceleration vectors have been derived and evaluated for different time instants.