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#### karush

##### Well-known member

- Jan 31, 2012

- 2,723

$$a(t)=-2.00 \, m/s^2 +3.00 \, m/s^3.$$

a. find the initial velocity $v_0$ such that the particle will have the same x-coordinate at $t=4.00\, s$ as it had at $t=0$.

b. What will be the velocity at $t=4.00 s$

ok sorry but I don't even know step one...