The diagram shows the trajectory of a ball that is thrown horizontally from the top of a
building. The ball's vertical and horizontal
velocity vectors, along with the resultant
vectors, are also indicated. If the ball takes 4,0 s
to reach the ground, what is the ball's vertical
speed by the time it reaches the ground?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good