free-fall, projectiles, and vectors check

Free fall is any motion of a body where ____ is the only force acting upon it.

If an object is in free fall for three seconds, how fast will it be falling at the end of its motion?

vf= gt

You drop your cell phone while in the bathroom in front of the mirror while the water is running in the sink below. If you are 0.45 meters above the sink, how long do you have before your cell phone is a gonner.

$$t=\sqrt[]{\frac{2d}{g}}$$  

A vector quantity has ______________.

A boat is traveling at 50 m/s in a river flowing at 15 m/s in the exact same direction. What is the resultant velocity of the boat?

A hiker walks 40 m due North then turns due South and walks 60 m. What is the resultant displacement?

Click all the measurements needed to determine the range of a horizontal projectile.