COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 47QAP
To determine
The x and the y components of the initial velocity of the projectile.
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Chapter 3 Solutions
COLLEGE PHYSICS
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- 46. •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_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_forward•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?arrow_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_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•• 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_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_forwardProblems • 1. A motorcycle stunt rider rides off the edge of a cliff. Just at the edge his velocity is horizontal with magnitude 5.0 m/s. Find the rider velocity and position after 1/4seconds.arrow_forward• 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?arrow_forward
- • 3. Find the velocity function, position function and coordinates for a-t and s- t graph of the given v-t graph below. V (m/s) 40 t (s) 30 90 120arrow_forward• 4. An object's position is described by the following polynomial for O s to 10 s. S (t) = t3 - 15 t2 + 54 t where Sin meters, %3D t is in seconds. Determine : a) The object's Velocity Function3; b) The object's acceleration Function; c) The object's position at, t = 4 s; d) The object's velocity at, t = 4 s; %3D e) The object's acceleration at t = 4s; f) The time and velocity when object returns to its original position; g) The time and velocity when acceleration is zero. h) Is the object's speed is increasing, decreasing, either if time is 4 s ? - NOTES E UELDIMDDOVE OFFICEarrow_forward•12-17. A ball is thrown with an upward velocity of 5 m/s from the top of a 10-m high building. One second later another ball is thrown vertically from the ground with a velocity of 10m/s. Determine the height from the ground where the two balls pass each other.arrow_forward
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