Question 4
An object has acceleration $a(t)=-20\cos(2t+\pi/4)$ m/s². Its velocity at $t=\pi/2$ seconds is $15\sqrt2$ m/s. Calculate its initial velocity.
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.