Projectiles and Vectors Review- Word Format
1. Which of the following is a physical quantity that has a magnitude but no direction?
a.vectorc.resultant
b.scalard.frame of reference
2. Which of the following is a physical quantity that has both magnitude and direction?
a.vectorc.resultant
b.scalard.frame of reference
3. A jogger runs 10.0 blocks due east, 5.0 blocks due south, and another 2.0 blocks due east. Assume all blocks are of equal size. Use the graphical method to find the magnitude of the jogger’s net displacement.
a.14.0 blocksc.11.0 blocks
b.8.0 blocksd.13.0 blocks
4. A plane flies from city A to city B. City B is 1540 km west and 1160 km south of city A. What is the total displacement and direction of the plane?
a.1930 km, 43.0 south of westc.1850 km, 37.0 south of west
b.1850 km, 43.0 south of westd.1930 km, 37.0 south of west
5. What is the path of a projectile?
a.a wavy line
b.a parabola
c.a hyperbola
d.Projectiles do not follow a predictable path.
6. Which of the following exhibits parabolic motion?
a.a person diving into a pool from a diving board
b.a space shuttle orbiting Earth
c.a leaf falling from a tree
d.a train moving along a flat track
7. A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the horizontal. How long is she in the air before returning to Earth? (g=9.81m/s2)
a.0.42 sc.1.5 s
b.0.83 sd.1.2 s
8. A model rocket flies horizontally off the edge of the cliff at a velocity of 50.0 m/s. If the canyon below is 100.0 m deep, how far from the edge of the cliff does the model rocket land?
a.112 mc.337 m
b.225 md.400 m
9. A firefighter 50.0 m away from a burning building directs a stream of water from a fire hose at an angle of 30.0 above the horizontal. If the velocity of the stream is 40.0 m/s, at what height will the stream of water strike the building?
a.9.60 mc.18.7 m
b.13.4 md.20.4 m
Short Answer
10. Briefly explain why a basketball being thrown toward the hoop is considered projectile motion.Because the only force acting on a projectile is gravity.
11. A football is kicked at 40.0 degrees to the horizontal at 18.0 m/s
A. Find the maximum height.3.1m
B. Find the time of travel.24s
C. How far away does it hit the ground?3.3m
D. Find the velocity vector at maximum height.13.8m
E. Find the acceleration vector at maximum height.-9.8m/s/s
12. A road runner runs directly off a cliff with an initial velocity of 3.5 m/s. The cliff is 89 m high. What distance does he land from the cliff?4.7m
13. An arrow is shot at 30.0° angle North of East. It has a velocity of 49 m/s.
A. Find its initial vertical and horizontal velocities.vx= 42.4 vy=24.5
B. How high will it go? 30m
C. What horizontal distance will the arrow travel? 31.7m
14.A hunter aims directly at a target (on the same level) 140 m away. If the bullet leaves the gun at a speed of 280 m/s, by how much will the bullet miss the bullseye? 1.23m
.5(9.8)(.52)= 1.23 y = -9.8(.52)/2
15. In the movie Thelma and Lousie, the two actress drove off a cliff at the end. In preparation for the scene, their stunt doubles determined that the cliff was 50.0 m high. The director wants the car to land 90.0 m away from the base of the cliff close to the camera location. How fast must the car be traveling in order to land at this location? 28m/s t=√2y-g t=√2(-50)/-9.8 t=3.2 vx=x/t x=90/3.2 x=28
16. A student threw a ball horizontally out of a window 7.0 m above the ground. It was caught by another student who was 10.0 m away, on the ground. What was the initial velocity of the ball?8.3m/s
t=√(2.7/9.8) = 1.21 vx = x/t = 10/1.2 = 8.3
17. Name as many variables that are vector quantities as you can:displacement, force, velocity, acceleration
18. What is the best angle to achieve the greatest horizontal distance? _____45______
What is the best angle to achieve the greatest initial Vx? ______0______
What is the best angle to achieve the greatest initial Vy? ______90______
What angle is best to achieve the greatest "hang time"? ______90______