1. A particle moves with curvilinear motion with coordinates given by - :2 4t + 20 and y -3sin2t
Determine at t=3 seconds: (a) the magnitudes of velocity and acceleration vectors, and (b) the angles
which these vectors make with the x-axis.
2. With what minimum horizontal velocity u can a boy throw a rock at A and have it just clear the
obstruction at B? (Note e 0, here).
3. A projectile is launched from point A with the initial conditions showni in the figure. Determine the
distance s which locates the point of impact B. Also calculate the time of flight t.
vo = 120 m/s
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