Horizontal Projectile Motion

Jes throws Mati a baseball 42 m/s horizontally from a height of 2m. How far will the ball travel before it reaches the ground?

26.88 m

Clara shoots a pool ball off of a 0.60-meter high table with an initial horizontal velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance to the ball's landing location.

t = 0.350 s

x = 0.84 m

Horizontal Projectiles

A soccer ball is kicked horizontally off a 22.0-meter high hill and lands a distance of 35.0 meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball.

16.5 m/s.

10/9/14 Adding Vectors

A pilot starts to fly due north for 20 km, then, he turns left (20 degrees West of North) for 5 km.  He finally turns around completely (70 degrees East of South) for another 20 km.  What is his final displacement?  (remember, displacement has both a magnitude and a direction)

7.82 km, 49 degrees North of Ea

10/8/14 Freefall/Kinematics

A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s². Determine the time for the feather to fall to the surface of the moon.

An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s². The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway?

Answer: t = 1.29 s

Answer: d = 704 m