Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 7, Problem 18P
To determine
Magnitude and direction of impulse
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You are working with a team that is designing a new roller coaster-type amusement park ride for a major theme park. You are present for the testing of the ride, in which an empty 150 kg car is sent along the entire ride. Near the end of the ride, the car is at near rest at the top of a 100 m
tall track. It then enters a final section, rolling down an undulating hill to ground level. The total length of track for this final section from the top to the ground is 250 m. For the first 230 m, a constant friction force of 370 N acts from computer-controlled brakes. For the last 20 m, which is
horizontal at ground level, the computer increases the friction force to a value required for the speed to be reduced to zero just as the car arrives at the point on the track at which the passengers exit.
(a) Determine the required constant friction force (in N) for the last 20 m for the empty test car.
Write AK + AU + AE int
= W+Q + TMW
+
TMT + TET + TER for the car-track-Earth system and solve for…
=
12 kg, and m3
Three objects with masses m₁ = 3.8 kg, m₂
find the speed of m3 after it moves down 4.0 m.
m/s
19 kg, respectively, are attached by strings over frictionless pulleys as indicated in the figure below. The horizontal surface exerts a force of friction of 30 N on m2. If the system is released from rest, use energy concepts to
m
m2
m3
i
Three objects with masses m₁ = 3.8 kg, m₂ = 12 kg, and m 19 kg, respectively, are attached by strings over frictionless pulleys as indicated in the figure below. The horizontal surface exerts a force of friction of 30 N on m2. If the system is released from rest, use energy concepts to
find the speed of m¸ after it moves down 4.0 m.
m/s
m
m2
mg
Chapter 7 Solutions
Physics: Principles with Applications
Ch. 7 - A railroad car loaded with rocks coasts on a level...Ch. 7 - 2. Which answer would you choose if the rocks fall...Ch. 7 - Prob. 1QCh. 7 - Prob. 2QCh. 7 - 3. When a person jumps from a tree to the ground,...Ch. 7 - Prob. 4QCh. 7 - Prob. 5QCh. 7 - Prob. 6QCh. 7 - According to Eq. 7-4, the longer the impact time...Ch. 7 - If a falling ball were to make a perfectly elastic...
Ch. 7 - A boy stands on the back of a rowboat and dives...Ch. 7 - It is said that in ancient times a rich man with a...Ch. 7 - The speed of a tennis ball on the return of a...Ch. 7 - Is it possible for an object to receive a larger...Ch. 7 - In a collision between two cars, which would you...Ch. 7 - A very elastic “superball” is dropped from a...Ch. 7 - Prob. 15QCh. 7 - Prob. 16QCh. 7 - Prob. 17QCh. 7 - Prob. 18QCh. 7 - Prob. 19QCh. 7 - Prob. 20QCh. 7 - Prob. 21QCh. 7 - Prob. 22QCh. 7 - Prob. 23QCh. 7 - Bob and Jim decide to play tug-of-war on a...Ch. 7 - 25. In one type of nuclear radioactive decay, an...Ch. 7 - Prob. 26QCh. 7 - Prob. 27QCh. 7 - Prob. 28QCh. 7 - Prob. 1MCQCh. 7 - Prob. 2MCQCh. 7 - Prob. 3MCQCh. 7 - Prob. 4MCQCh. 7 - Prob. 5MCQCh. 7 - Prob. 6MCQCh. 7 - Prob. 7MCQCh. 7 - Prob. 8MCQCh. 7 - Prob. 9MCQCh. 7 - 10. Choose the best answer in the previous...Ch. 7 - 11. A railroad tank car contains milk and rolls at...Ch. 7 - Prob. 12MCQCh. 7 - 1. (I) What is the magnitude of the momentum of a...Ch. 7 - A constant friction force of 25 N acts on a 65-kg...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Calculate the force exerted on a rocket when the...Ch. 7 - A 7700-kg boxcar traveling 14 m/s strikes a second...Ch. 7 - A child in a boat throws a 5.30-kg package out...Ch. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - An object at rest is suddenly broken apart into...Ch. 7 - A22- bullet traveling 240 m/s penetrates a 2.0-kg...Ch. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - A golf ball of mass 0.045 kg is hit off the lee at...Ch. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - With what impulse does a 0.50-kg newspaper have to...Ch. 7 - Prob. 23PCh. 7 - (a) Calculate the impulse experienced when a 55-kg...Ch. 7 - A ball of mass 0.440 kg moving east (+ x...Ch. 7 - 26. (II) A 0.450-kg hockey puck, moving east with...Ch. 7 - Prob. 27PCh. 7 - Two billiard balls of equal mass undergo a...Ch. 7 - 29. (II) A 0.280-kg croquet ball makes an elastic...Ch. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Prob. 32PCh. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Car A hits car B (initially at rest and of equal...Ch. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - An atomic nucleus of mass m traveling with speed v...Ch. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Find the center of mass of the three-mass system...Ch. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - Prob. 53PCh. 7 - Prob. 54PCh. 7 - Prob. 55PCh. 7 - Prob. 56PCh. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - Prob. 60PCh. 7 - Prob. 61PCh. 7 - Prob. 62PCh. 7 - Prob. 63PCh. 7 - Prob. 64PCh. 7 - Prob. 65PCh. 7 - Prob. 66PCh. 7 - Prob. 67GPCh. 7 - Prob. 68GPCh. 7 - Prob. 69GPCh. 7 - Prob. 70GPCh. 7 - Prob. 71GPCh. 7 - Prob. 72GPCh. 7 - Prob. 73GPCh. 7 - Prob. 74GPCh. 7 - Prob. 75GPCh. 7 - Prob. 76GPCh. 7 - Prob. 77GPCh. 7 - Prob. 78GPCh. 7 - Prob. 79GPCh. 7 - Prob. 80GPCh. 7 - Astronomers estimate that a 2.0-km-diameter...Ch. 7 - Prob. 82GPCh. 7 - Prob. 83GPCh. 7 - Prob. 84GPCh. 7 - Prob. 85GPCh. 7 - 86. A novice pool player is faced with the corner...
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- In order for Jane to return to base camp, she needs to swing across a river of width D that is filled with alligators. She must swing into a wind exerting constant horizontal force F, F = 110 N, L = 40.0 m, 0 = 50.0°, and her mass to be 50.0 kg. Wind →F Tarzan! Jane (a) with what minimum speed (in m/s) must Jane begin her swing to just make it to the other side? (If Jane can make it across with zero initial velocity, enter 0.) m/s on a vine having length L and initially making an angle with the vertical (see below figure). Take D = 48.0 m, (b) Shortly after Jane's arrival, Tarzan and Jane decide to swing back across the river (simultaneously). With what minimum speed (in m/s) must they begin their swing? Assume that Tarzan has a mass of 80.0 kg. m/sarrow_forwardR=2.00 12V 2.00 4.00 4.002 What is the current in one of the 4.0 Q resistors? An isolated point charge q is located at point X. Two other points Y and Z are such that YZ2 XY. Y X What is (electric field at Y)/(electric field at Z)?arrow_forwardTwo objects (m₁ = 4.75 kg and m₂ 2.80 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 4.75-kg object is released from rest at a point h = 4.00 m above the table mg m (a) Determine the speed of each object when the two pass each other. m/s (b) Determine the speed of each object at the moment the 4.75-kg object hits the table. m/s (c) How much higher does the 2.80-kg object travel after the 4.75-kg object hits the table? marrow_forward
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