If a skateboarder lands on the ground after 3 seconds with a final velocity of — 4.5 m/s, what is the skateboarder's initial velocity? Assume (a = -9.8 ) -9.8m/s2

-33.9 m/s

The initial velocity cannot be determined from what is given.

24.9 m/s

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

Why does lightning travel from clouds to the ground?

Ain is , is 's of ? 0.62 0.79 1.27 1.50