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

Adelivery truck leaves a warehouse and travels 2.60 km north. the truck makes a left turn and travels 1.25 km west before making another right turn to travel 1.40 km north to arrive at its destination. what is the magnitude and direction of the truck's displacement from the warehouse?

Experiment scenario 2: a biology student wants to conduct a study of how the amount of food affects the weight gain for mice. i have set up four cages with a mouse in each cage. fill in the boxes that would allow the biology student to complete the study correctly

What is the relationship between ozone and smog?