a physics student on planet exidor throws a ball th

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A physics student on Planet Exidor throws a ball that follows the parabolic trajectory shown. The ball’s position is shown at one-second intervals until t = 3 s. At t = 1 s, the ball’s velocity is v = (2 i + 2 j) m/s.
a. Determine ball’s velocity at t= 0, 2, 3
b. Value of g on Planet Exidor?
c. What ws the ball’s launch angle?

 
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