COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 49QAP
To determine
How far a Chinook salmon can travel horizontally after it leaves the water.
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•73 Two highways intersect as shown in Fig. 4-46. At the instant
shown, a police car P is distance dp = 800 m from the intersection
and moving at speed vp = 80 km/h. Motorist M is distance d,
600 m from the intersection and moving at speed vm = 60 km/h.
M
VM
P
Vp
(H)
-dp
Figure 4-46 Problem 73.
(a) In unit-vector notation, what is the velocity of the motorist
with respect to the police car? (b) For the instant shown in Fig. 4-46,
what is the angle between the velocity found in (a) and the line of
sight between the two cars? (c) If the cars maintain their veloci-
ties, do the answers to (a) and (b) change as the cars move nearer
the intersection?
79. •Sports Gabriele Reinsch threw a discus 76.80 m on
July 9, 1988, to set the women's world record. Assume
that she launched the discus with an elevation angle of
45°, and that her hand was 2.0 m over the ground at the
instant of launch. What is the initial speed of the discus
required to achieve that range? (Neglect any effects due
to air resistance.) SSM
• A dolphin jumps with an initial velocity of 12.0 m>s at an angleof 40.0° above the horizontal. The dolphin passes through thecenter of a hoop before returning to the water. If the dolphin ismoving horizontally when it goes through the hoop, how highabove the water is the center of the hoop?
Chapter 3 Solutions
COLLEGE PHYSICS
Ch. 3 - Prob. 1QAPCh. 3 - Prob. 2QAPCh. 3 - Prob. 3QAPCh. 3 - Prob. 4QAPCh. 3 - Prob. 5QAPCh. 3 - Prob. 6QAPCh. 3 - Prob. 7QAPCh. 3 - Prob. 8QAPCh. 3 - Prob. 9QAPCh. 3 - Prob. 10QAP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- •• A mountain climber jumps a 2.8-m-wide crevasse by leapinghorizontally with a speed of 7.8 m>s. (a) If the climber’s directionof motion on landing is -45°, what is the height difference betweenthe two sides of the crevasse? (b) Where does the climber land?arrow_forward58. . A motorcyclist drives at 22 m/s in a direction 35° east of north relative to a car, and at 8.0 m/s due north relative to Earth. (a) What is the magnitude of the car's velocity relative to Earth? (b) What is the direction of the car's velocity relative to Earth, measured counterclockwise from due east? Example 3-11arrow_forward49. •A tiger leaps horizontally out of a tree that is 4.00 m high. If he lands 5.00 m from the base of the tree, calculate his initial speed. (Neglect any effects due to air resistance.) SSMarrow_forward
- • An astronaut on the planet Zircon tosses a rock horizontally witha speed of 6.95 m>s. The rock falls through a vertical distance of1.40 m and lands a horizontal distance of 8.75 m from the astronaut. What is the acceleration due to gravity on Zircon?arrow_forwardREC Example(3):- A projectile is the edge of a 150 m cliff with an initial velocity of 180 m/sec at an angle of 30° with the horizontal. Neglecting air resistance, find:- (a) The horizontal distance from the gun to the point where the projectile strikes the ground. (b) The greatest elevation above the ground reached by the projectile. Ans. (a) X = 3102.4 m, (b) Greatest elevation = 562. 8 m 180 mis 150 marrow_forward• 2. A projectile is fired with a horizontal velocity of 330 m/s from the top of a cliff 80 m high. a) how long will it take to strike the level ground at the base of the cliff? b) how far from the foot of the cliff will it strike? c) With what velocity will it strike?arrow_forward
- • You are riding on a Jet Ski at an angle of 35° upstream on a riverflowing with a speed of 2.8 m>s. If your velocity relative to theground is 9.5 m>s at an angle of 20.0° upstream, what is the speedof the Jet Ski relative to the water?arrow_forward46. •An object undergoing parabolic motion travels 100 m in the horizontal direction before returning to its initial height. If the object is thrown initially at a 30° angle, determine the x component and the y component of the initial velocity. (Neglect any effects due to air resistance.)arrow_forward•15 SSM ILW WWW The two vec- tors a and b in Fig. 3-28 have equal magnitudes of 10.0 m and the angles 9. are 0, = 30° and 0,=105°. Find the 02 %3D (a) x and (b) y components of their vector sum r, (c) the magnitude of 7, and (d) the angle 7 makes with a the positive direction of the x axis. Figure 3-28 Problem 15.arrow_forward
- Component and polygon method. -You walk 20. blocks north, then 10. Blocks East, then 18 blocks South. What is your displacement?•-A certain river has a current that flows at 2.0 m/s West. If you point your boat, which can move at 5.0 m/s, directly across the stream to the North, what is your resultant velocity?arrow_forward•• I P A white-crowned sparrow flying horizontally with a speed of 1.80 m/s folds its wings and begins to drop in free fall. How far does the sparrow fall after traveling a horizontal distance of 0.500 m? If the sparrow’s initial speed is increased, does the distance of fall increase, decrease, or stay the same? Graph and solve .arrow_forward•24 Vector Á, which is directed along an x axis, is to be added to vector B, which has a magnitude of 7.0 m. The sum is a third vector that is directed along the y axis, with a magnitude that is 3.0 times that of Å.What is that magnitude of Å?arrow_forward
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