A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown in the figure . The balls position is shown at 1s intervals until
=3s. At
=1s, the balls velocity is
=(
2.0+
2.0^{ })/s.

Determine the balls velocity at =0.

Determine the balls velocity at =2s.

Determine the balls velocity at =3s.

What is the value of on Planet Exidor?

What was the balls launch angle?

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