PHYS2014 Fall 2009
Benton OSU Physics Dept.
1
Physics 2014: General Physics I
Homework Assignment 2
Due: Friday, 4 September 2009 at the beginning of your Recitation session.
Problems:
1.In 1989, Lee Wheelis of Luling, TX set the world record for longest watermelon seed spit. He
spit a watermelon seed a distance of 20.96 m. a) Assuming that he spit the watermelon seed at an
angle of 45°, what was the initial velocity of the seed? b) What was the maximum height above
the ground reached by the seed during it’s flight? Assume that he spit the seed from ground level
and that you can neglect air resistance.
2. A B-2 Stealth Bomber is flying at an altitude of 10,000 m and at a speed of 200 m/s when it
drops a 500 lb bomb on a target situated on the ground. Determine the angle,
φ
, between the
vertical and the line of sight between the bomber and the target at the instant the bomb is
released.
3. A bullet fired from a handgun is found to have a muzzle velocity (velocity of the bullet as it
leaves the gun’s barrel) of 900 m/s. The length of the gun barrel is 0.14 cm and the mass of the
bullet is 1.5 g. Find the average acceleration of the bullet inside the barrel. Neglecting air
resistance, find both the maximum height above the ground and the maximum range a bullet
could reach.
4. You accept an invitation to watch an archery demonstration with a bunch of OSU bigwigs.
Everyone watches as an archer shoots an arrow horizontally. An announcer states over the PA
system that the arrow traveled 100 feet before it penetrated into the grass at an angle of 86° with
respect to the vertical. You then hear President Hargis say, “I wonder how fast one of those
φ
10,000 m
