A person throws a baseball from height of 7 feet with an initial vertical velocity of 50 feet per second. Use the vertical motion model, h =-16t +ut + s. where v is the initial velocity in feet per second and s Is the height in feet, to calculaté the amount of time the baseball is In the air before it hits the ground. Round your answer to the nearest tenth if necessary. Time in air: seconds

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?