College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321902559
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Chapter 1, Problem 15CQ
A car is driving north at a steady speed. It makes a gradual 90° left turn without losing speed, then continues driving to the west. Draw a motion diagram, using the particle model, showing the car's velocity vectors as seen from a helicopter hovering over the highway.
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The Lost Drone. You and your team are exploring the edge of an Antarctic mountain range and you send a drone ahead to help
navigate. After takeoff you lose sight of the drone and, a few seconds later, the controls malfunction and the drone stops sending visual
images and navigational information except for speed and directional data. Changing speeds erratically, the drone heads west until it
makes a drastic turn at the 5-minute mark to B = 30° east of south. After nearly ten minutes, the speed drops to zero and the drone
stops sending data. It has crashed. Using the speed/directional data, the team draws up the graph shown below.
(a) How far is the drone from you?
(b) In what direction must you go to retrieve it? Express your result as a geographical direction west of south.
20
(s/w) /
Velocity
15
10
LO
5
0
0
WEST
100
200
300
Time t (s)
3° East of South
400
500
600
The Lost Drone. You and your team are exploring the edge of an Antarctic mountain range and you send a drone ahead to help
navigate. After takeoff you lose sight of the drone and, a few seconds later, the controls malfunction and the drone stops sending visual
images and navigational information except for speed and directional data. Changing speeds erratically, the drone heads west until it
makes a drastic turn at the 5-minute mark to ß = 35° east of south. After nearly ten minutes, the speed drops to zero and the drone
stops sending data. It has crashed. Using the speed/directional data, the team draws up the graph shown below.
(a) How far is the drone from you?
(b) In what direction must you go to retrieve it? Express your result as a geographical direction west of south.
20
(a) Number
Velocity v (m/s)
15
10
5
0
2250
(b) Number i 36.406
WEST
100
Units
Units
200
m
300
Time t (s)
3° East of South
400
west of south.
500
600
Gordon likes to take his dog for a walk on the beach each morning. The beach near his home is quite large, so he can park his car on it. He has a routine that he likes to stick to. Gordon parks his car at a point C that is 34◦ west of south of a point L where the lifeguard sits. He then walks in a straight line from his car to L. Next, he changes direction and walks due south along the shoreline in a straight line for 1200 metres until he reaches a large rock R, where he turns again and heads straight back to his car, which is 740 metres from the large rock. (You may assume that the beach is flat and all distances are measured in a straight line.)
(iii) Find the distance between Gordon’s car and the lifeguard. Give your answer correct to two significant figures.
Chapter 1 Solutions
College Physics: A Strategic Approach (3rd Edition)
Ch. 1 - a Write a paragraph describing the particle model....Ch. 1 - A softball player slides into second base. Use the...Ch. 1 - A car travels to the left at a steady speed for a...Ch. 1 - A ball is dropped from the roof of a tall building...Ch. 1 - Write a sentence or two describing the difference...Ch. 1 - Give an example of a trip you might take in your...Ch. 1 - Write a sentence or two describing the difference...Ch. 1 - The motion of a skateboard along a horizontal axis...Ch. 1 - You are standing on a straight stretch of road and...Ch. 1 - Two friends watch a jogger complete a 400 m lap...
Ch. 1 - A softball player hits the ball and starts running...Ch. 1 - A child is sledding on a smooth, level patch of...Ch. 1 - A skydiver jumps out of an airplane. Her speed...Ch. 1 - Your roommate drops a tennis ball from a...Ch. 1 - A car is driving north at a steady speed. It makes...Ch. 1 - A toy car rolls down a ramp, then across a smooth,...Ch. 1 - Density is the ratio of an object's mass to its...Ch. 1 - A student walks 1.0 mi west and then 1.0 mi north....Ch. 1 - You throw a rock upward. The rock is moving...Ch. 1 - Which of the following motions could be described...Ch. 1 - Which of the following motions is described by the...Ch. 1 - A bird flies 3.0 km due west and then 2.0 km due...Ch. 1 - Weddell seals make holes in sea ice so that they...Ch. 1 - A bird flies 3.0 km due west and then 2.0 km due...Ch. 1 - A woman walks briskly at 2.00 m/s. 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