Concept explainers
Animal Athletes
Different animals have very different capacities for running. A horse can maintain a top speed of 20 m/s for a long distance but has a maximum acceleration of only 6.0 m/s2, half what a good human sprinter can achieve with a block to push against. Greyhounds, dogs especially bred for feats of running, have a top speed of 17 m /s, but their acceleration is much greater than that of the horse. Greyhounds are particularly adept at turning corners at a run.
Figure 1.1
A greyhound on a racetrack turns a corner at a constant speed of 15 m/s with an acceleration of 7.1 m/s2. What is the radius of the turn?
A. 40 m
B. 30 m
C. 20 m
D. 10 m
Want to see the full answer?
Check out a sample textbook solutionChapter P Solutions
College Physics: A Strategic Approach (4th Edition)
Additional Science Textbook Solutions
Essential University Physics: Volume 2 (3rd Edition)
Sears And Zemansky's University Physics With Modern Physics
Conceptual Physical Science (6th Edition)
Conceptual Integrated Science
The Cosmic Perspective
Introduction to Electrodynamics
- A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around a level track with two nearly straight sections and two nearly semicircular sections, as shown in the aerial view of Figure CQ7.12. (a) What are the directions of his velocity at points A, B, and C? For each point, choose one: north, south, east, west, or nonexistent, (b) What are the directions of his acceleration at points A, B, and C? Figure CQ7.12arrow_forwardThe Cooper’s Hill Cheese-Rolling and Wake is an annual event held in England where a wheel of cheese is rolled down a hill while people chase after it competing on who can catch it first. If the hill has a height of 69.6 m and the cheese starts at rest, what is the cheese’s velocity at the bottom of the hill? Ignore friction.arrow_forwardA child is playing with a ball on a level surface. She gives the ball a push to get it rolling, then the ball rolls a short distance before coming to a stop. Which of the following explains why the ball slows to a stop? a. the child stopped pushing it b. the speed is proportional to the force c. there must have been some force on the ball opposing the direction of motion d. the net force on the ball was zero, so it wanted to remain stationaryarrow_forward
- Part A A 480 g peregrine falcon reaches a speed of 63 m/s in a vertical dive called a stoop. (Figure 1) If we assume that the falcon speeds up under the influence of gravity only, what is the minimum height of the dive needed to achieve this speed? Express your answer with the appropriate units. HẢ 圖] ? h = Value Units Submit Request Answer Provide Feedback Next > Figure 1 of 1arrow_forwardScientific Narrative 14 Using your HW Guide as a resource, write a scientific narrative paragraph for the following prompt: How can a ball bouncing up and down be used to describe acceleration?arrow_forward1. There are how many laws of motion?a. 5 b. 2 c. 3 d. 4 2. Which law of motion is also known as Law of Inertia?a. Newton’s 1st Law c. Newton’s 2nd Lawb. Newton’s 3 rd Law d. All of the above 3. When an object at rest velocity and acceleration is zeroa. object starts to move c. object continues to be at motionb. object continues to be at rest d. none of the above 4. Which is the Newton’s3rd Law of motion?a. The rate of change of linear momentum is equal to force acting on the body.b. An object will remain at rest or in uniform motion in a straight line unless acted upon by an external forcec. All forces in the universe occur in equal but oppositely directed pairs.d. None of these. 5. When we kick a ball, force is exerted in _________a. specific direction c. multi forceb. all direction d. none of the abovearrow_forward
- Which of the following is NOT an Aristotle’s concept about motion? * A. Motion can be natural or violent. B. An object will move if an external force is applied. C. The motion of an object is parallel to the ground until it is the object's time to fall back into the ground. D. An object in motion, if unimpeded, will continue to be in motion; an external force is not necessary to maintain the motion. A rock, a crumpled paper, and a rubber ball, with different masses, were dropped simultaneously. Neglecting air resistance, which object will have the greatest acceleration upon reaching the ground? * A. The crumpled paper will have the greatest acceleration. B. The three objects will have the same acceleration. C. The rubber ball will have the greatest acceleration. D. The stone will have the greatest acceleration. The higher the index of refraction of a medium, * A. the higher its critical angle. B. slower…arrow_forwardYou are asked to double the acceleration of a billiard ball (pool ball). Describe how you will have to change the original force to do this. Explain/show how Newton's 2nd law helps you to get the correct answer. Use complete sentences! A. You will have to apply 2 times the original force B. You will have to apply 3 times the original force C. You will have to apply only 1/2 the original force D. It is not necessary to change the original forcearrow_forwardDirections:Answer the following problems: 1.A car drives east at 40 m/s for 500 seconds, stops, turns around, then drives west at 50 m/s for 400 seconds and stops. What is the displacement of the car? What is the distance the car traveled? 2.An object move to the left from X1: 9 to X2: -3 find the distance and displacement. 3. What is the distance and displacement of the ball as it bounce back from the wall with 2m initial distance and 4m as final distance. 4.What is the distance and displacement of the bullet, shot in a can with a starting point of 5m to 10m end. 5. An object travels 80m east and then 160m south. What is the distance and displacement?arrow_forward
- I Review I Constants For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Gravity on mars. Part A At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.595 m/s² if the acceleration due to gravity at the surface has magnitude 9.80 m/s²? Express your answer in meters. ? d = m Submit Request Answerarrow_forwardI. NEWTON’S LAWS OF MOTION 1. When you are in a train, your body leans backwards as the train starts to move from rest. What Newton’s law of motion does this demonstrate? A. 2nd Law of Motion B. Law of Acceleration C. 1st Law of Motion D. 3rd Law of Motion 2. A shooter experiences a recoil after firing a bullet with a gun. What Newton’s law of motion does this demonstrate? A. 3rd Law of Motion B. Law of Inertia C. 2nd Law of Motion D. 1st Law of Motion 3. The greater the force you apply to an object the greater the change in velocity is per unit of time. What Newton’s law of motion does this demonstrate? A. 1st Law of Motion B. Law of Interaction C. 3rd Law of Motion D. 2nd Law of Motion 4. What will be the new value of an object’s acceleration if we square the original mass of it? A. Acceleration will increase by a factor equals to gravitational acceleration. B. Acceleration will remain the same. C. Acceleration will decrease by a factor equals to mass. D. Acceleration will be…arrow_forwardBased on the table in the picture answer the following questions. a. Does height affect the speed of the car? Explain your answer b. What is your conclusion?arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning