PHYSICS 1403, QUIZ 2
Chapter 3
February 4, 2004
Partial credit will be liberal, provided you show your work!
USE BACK IF NECESSARY!
Name: ______________________
Social Security Number ______________________
1. (20 points) See figure. A person stands a horizontal distance d from the base of
a building. He throws a ball from the ground towards the building. Its initial
velocity is v0 = 20 m/s at an initial angle θ0 = 37º with respect to the horizontal.
It hits the building at a height h above the ground. At the point where it hits, its
vertical component of velocity vy = 0 (that is, at that point, its velocity is
entirely in the horizontal direction.)
a. Compute the x and y components, vx0 and vy0, of the initial velocity.
b. How much time does it take the ball to hit the building?
c. Compute the height h where the ball hits the building.
d. Compute the distance d from the base of the building where the thrower is standing.
2. (10 points) See figure. An airplane is traveling with a constant velocity v =
600 km/h in a direction 30º West of North. (Conversion from km/h to m/s is
not necessary to solve this problem!)
a. Find the components of the velocity vector in the Northerly and Westerly
directions.
b. How far North and how far West has the plane traveled after a time t = 1.5 h?
d