University Physics Volume 1 18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: William Moebs, Samuel J. Ling, Jeff Sanny
1 Units And Measurement 2 Vectors 3 Motion Along A Straight Line 4 Motion In Two And Three Dimensions 5 Newton's Law Of Motion 6 Applications Of Newton's Laws 7 Work And Kinetic Energy 8 Potential Energy And Conservation Of Energy 9 Linear Momentum And Collisions 10 Fixed-axis Rotation 11 Angular Momentum 12 Static Equilibrium And Elasticity 13 Gravitation 14 Fluid Mechanics 15 Oscillations 16 Waves 17 Sound Chapter3: Motion Along A Straight Line
Chapter Questions Section: Chapter Questions
Problem 3.1CYU: Check your Understanding A cyclist rides 3 km west and then tune around and tides 2 kin east. (a)... Problem 3.2CYU: Check your Understanding The position of an object as a function of time is x(t)=3t2m . (a) What is... Problem 3.3CYU: Check Your Understanding Protons in a linear accelerator are accelerated from rest to... Problem 3.4CYU: Check Your Understanding An airplane lands on a runway traveling east. Describe its acceleration. Problem 3.5CYU: Check Your Understanding A manned rocket accelerates at a rate of 20m/s2 during launch. How long... Problem 3.6CYU: Check Your Understanding A bicycle has a constant velocity of 10 m/s. A person starts from rest and... Problem 3.7CYU: Check Your Understanding A chunk of ice beaks off a glacier and falls 30.0 m before it hits the... Problem 3.8CYU: Check Your Understanding A particle starts from rest and has an acceleration function 510tm/s2 . (a)... Problem 1CQ: Position, Displacement, and Average Velocity Give an example in which there are clear distinctions... Problem 2CQ: Under what circumstances does distance traveled equal magnitude of displacement? What is the only... Problem 3CQ: Bacteria move back and forth using their flagella (structures that look like little tails). Speeds... Problem 4CQ: Give an example of a device used to measure time and identify what change in that device indicates a... Problem 5CQ: Does a car’s odometer measure distance traveled or displacement? Problem 6CQ: During a given time interval the average velocity of an object is zero. What can you say conclude... Problem 7CQ: There is a distinction between average speed and the magnitude of average velocity. Give an example... Problem 8CQ: Does the speedometer of a car measure speed or velocity? Problem 9CQ: If you divide the total distance traveled on a car trip (as determined by the odometer) by the... Problem 10CQ: How are instantaneous velocity and instantaneous speed related to one another? How do they differ? Problem 11CQ: Is it possible for speed to be constant while acceleration is not zero? Problem 12CQ: Is it possible for velocity to be constant while acceleration is not zero? Explain. Problem 13CQ: Give an example in which velocity is zero yet acceleration is not. Problem 14CQ: If a subway train is moving to the left (has a negative velocity) and then comes to a stop, what is... Problem 15CQ: Plus and minus signs are used in one-dimensional motion to indicate direction. What is the sign of... Problem 16CQ: Motion with Constant Acceleration When analyzing the motion of a single object, what is the required... Problem 17CQ: State two scenarios of the kinematics of single object where three known quantities require two... Problem 18CQ: What is the acceleration of a rock thrown straight upward on the way up? At the top of its flight?... Problem 19CQ: An object that is thrown straight up falls back to Earth. This is one-dimensional motion. (a) When... Problem 20CQ: Suppose you throw a rock nearly straight up at a coconut in a palm tree and the rock just misses the... Problem 21CQ: The severity of a fall depends on your speed when you strike the ground. All factors but the... Problem 22CQ: How many times higher could an astronaut jump on the Moon than on Earth if her takeoff speed is the... Problem 23CQ: Finding Velocity and Displacement from Acceleration When given the acceleration function, what... Problem 24P: Position, Displacement, and Average Velocity Consider a coordinate system in which the positive x... Problem 25P: A car is 2.0 km west of a traffic light at t=0 and 5.0 km east of the light at t=6.0min . Assume the... Problem 26P: The Shanghai maglev train connects Longyang Road to Pudong International Airport, a distance of 30... Problem 27P: The position of a particle moving along the x -axis is given by x(t)=4.02.0tm . (a) At what time... Problem 28P: A cyclist rides 8.0 km east for 20 minutes, then he turns and heads west for 8 minutes and 3.2 km.... Problem 29P: On February 15, 2013, a superbolide meteor (brighter than the Sun) entered Earth’s atmosphere over... Problem 30P: A woodchuck runs 20 m to the right in 5 s, then rums and runs 10 m to the left in 3 s. (a) What is... Problem 31P: Sketch the velocity-versus-time graph from the following position-versus-time graph. Problem 32P: Sketch the velocity-versus-time graph from the following position-versus-time graph. Problem 33P: Given the following velocity-versus-time graph, sketch the position-versus-time graph. Problem 34P: An object has a position function x(t)=5tm . (a) What is the velocity as a function of time? (b)... Problem 35P: A particle moves along the x -axis according to x(t)=10t2m . (a) What is the instantaneous velocity... Problem 36P: Unreasonable results. A particle moves along the x -axis according to x(t)=3t3+5t . At what time is... Problem 37P: Average and Instantaneous Acceleration A cheetah can accelerate from rest to a speed of 30.0 m/s in... Problem 38P: Dr. John Paul Stapp was U.S. Air Force officer who studied the effect of extreme acceleration on the... Problem 39P: Sketch the acceleration-versus-time graph from the following velocity-versus-time graph. Problem 40P: A commuter backs her car out of her garage with an acceleration of 1.40m/s2 . (a) How long does it... Problem 41P: Assume an intercontinental ballistic goes from rest to a suborbital speed of 6.50 km/s 60.0 s (the... Problem 42P: An airplane, starting from rest, move down the runway at constant for 18 s and then takes off at a... Problem 43P: Motion with Constant Acceleration A particle moves in a straight line at constant velocity of 30... Problem 44P: A particle moves in a straight line with an initial velocity of 0 m/s and a constant acceleration of... Problem 45P: A particle moves in a straight line with an initial velocity of 30 m/s and constant acceleration... Problem 46P: (a) Sketch a graph of velocity versus time corresponding to the graph of displacement versus time... Problem 47P: (a) Sketch a graph of acceleration versus time corresponding to the graph of velocity versus time... Problem 48P: A particle has a contant acceleration of 6.0m/s2 . (a) If its initial velocity is 2.0 m/s, at what... Problem 49P: At t=10s , a particle is moving from left to right with a speed of 5.0 m/s. At t=20s , the particle... Problem 50P: A well-thrown ball is caught in a well-padded mitt. If the acceleration of the ball is 2.10104m/s2 ,... Problem 51P: A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate... Problem 52P: (a) A light-rail commuter train accelerates at a rate of 1.35m/s2 . How long does it take to reach... Problem 53P: While entering a freeway, a car accelerates from rest at a rate of 2.40m/s2 for 12.0 s. (a) Draw a... Problem 54P: Unreasonable results At the end of a race, a runner decelerates from a velocity of 9.00 m/s at a... Problem 55P: Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm left ventricle of the heart.... Problem 56P: During a slap shot, a hockey player accelerates the puck from a velocity of 8.00 m/s to 40.0 m/s in... Problem 57P: A powerful motocycle can accelerate from rest to 26.8 m/s (100 km/h) in only 3.90 s. (a) What is its... Problem 58P: Freight trains can product only relatively small accelerations. (a) What is the final velocity of a... Problem 59P: A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250 m. (a)... Problem 60P: A swan on a lake gets airborne by flapping its wings and running on top of the water. (a) If the... Problem 61P: A woodpecker’s brain is specially protected from large accelerations by tendon-like attachments... Problem 62P: An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s... Problem 63P: A care package is dropped out of a cargo plane and lands in the forest. If we assume the care... Problem 64P: An express train passes through a station. It enters with an initial velocity of 22.0 m/s and... Problem 65P: Unreasonable results Dragsters can actually reach a top speed of 145.0 m/s in only 4.45 s. (a)... Problem 66P: Calculate the displacement and velocity at times of (a) 0.500 s, (b) 1.00 s, (c) 1.50 s, and (d)... Problem 67P: Calculate the displacement and velocity at times of (a) 0.500 s, (b) 1.00 s, (c) 1.50 s. (d) 2.00 s,... Problem 68P: A basketball referee tosses the ball straight up for the starting tip-off. At what velocity must a... Problem 69P: A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life... Problem 70P: Unreasonable results A dolphin in an aquatic show jumps straight up out of the water at a velocity... Problem 71P: A diver bounces straight up from a diving board, avoiding the diving board on the way down, and... Problem 72P: (a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is... Problem 73P: A very strong, but inept, shot putter puts the shot straight up vertically with an initial velocity... Problem 74P: You throw a ball straight up with an initial velocity of 15.0 m/s. It passes a tree branch on the... Problem 75P: A kangaroo can jump over an object 2.50 m high. (a) Considering just its vertical motion, calculate... Problem 76P: Standing at the base of one of the cliffs of Mt. Arapiles in Victoria, Australia, a hiker hears a... Problem 77P: There is a 25O-m-high cliff at Half Dome in Yosemite National Pad in California. Suppose a boulder... Problem 78P: The acceleration of a particle varies with time according to the equation a(t)=pt2qt3 . Initially,... Problem 79P: Between t=0 and t=t0 , a rocket moves straight upward with an acceleration given by a(t)=ABt1/2 ,... Problem 80P: The velocity of a particle moving along the x -axis varies with time according to v(t)=A+Bt1 , where... Problem 81P: A particle at rest leaves the origin with its velocity Increasing with time according to... Problem 82AP: Professional baseball player Nolan Ryan could pitch a baseball at approximately 160.0 km/h. At that... Problem 83AP: An airplane leaves Chicago and makes the 3000-km trip Los Angeles in 5.0 h. A second plane leaves... Problem 84AP: Unreasonable Results A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km... Problem 85AP: An object has an acceleration of +1.2cm/s2 . At t=4.0sits velocity is -3.4cm/s . Determine the... Problem 86AP: A particle moves along the x -axis according to the equation x(t)=2.04.0t2 . What are the velocity... Problem 87AP: A particle moving at constant acceleration has velocities of 2.0m/s at t=2.0s and -7.6m/s at t=5.2s... Problem 88AP: A train is mowing up a steep grade at constant velocity (see following figure) when its caboose... Problem 89AP: An electron is moving in a straight line with a velocity of 4.0105m/s . It enters a region 5.0 cm... Problem 90AP: An ambulance driver is rushing a patient to the hospital. While traveling at 72 km/h, she notices... Problem 91AP: A motorcycle that is slowing down uniformly covers 2.0 successive km in 80 s and 120 s,... Problem 92AP: A cyclist travels from point A to point B in 10 mm. During the first 2.0 mm of her trip, she... Problem 93AP: Two trains are moving at 30 m/s in opposite directions on the same track. The engineers see... Problem 94AP: A 10.0-m-long truck moving with a constant velocity of 97.0 km/h passes a 3.0-m-long car moving with... Problem 95AP: A police car waits in hiding slightly off the highway. A speeding car is spotted by the police car... Problem 96AP: Pablo is running in a half marathon at a velocity of 3 m/s. Another runner, Jacob, is 50 meters... Problem 97AP: Unreasonable results A runner approaches the finish line and is 75 m away; her average speed at this... Problem 98AP: An airplane accelerates at 5.0m/s2 for 30.0 s. During this time, it covers a distance of 10.0 km.... Problem 99AP: Compare the distance traveled of an object that undergoes a change in velocity that Is twice its... Problem 100AP: An object is moving east with a constant velocity and is at position x0 at time t0=0 . (a) With what... Problem 101AP: A ball is thro straight up. It passes a 2.00-m-high window 7.50 m off the ground on its path up and... Problem 102AP: A coin is dropped from a hot-air balloon that is 300 m above the ground and rising at 10.0 m/s... Problem 103AP: A soft tennis ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of... Problem 104AP: Unreasonable results. A raindrop falls from a cloud 100 m above the ground. Neglect air resistance.... Problem 105AP: Compare the time in the air of a basketball player who jumps 1.0 m vertically off the floor with... Problem 106AP: Suppose that a person takes 0.5 s to react and move his hand to catch an object he has dropped. (a)... Problem 107AP: A hot-air balloon rises from ground level at a constant velocity of 3.0 m/s. One minute after... Problem 108AP: (a) A world record was se for the men’s 100-m dash in the 2008 Olympic Games in Beijing by Usain... Problem 109AP: An object is dropped from a height of 75.0 m above ground level. (a) Determine the distance traveled... Problem 110AP: A steel ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of 1.45... Problem 111AP: An object is dropped from a roof of a building of height h . During the last second of its descent,... Problem 112CP: In a 100-rn race, the winner is timed at 11.2 s. The second-place finisher’s time Is 11.6 s. How far... Problem 113CP: The position of a particle moving along the x -axis varies with time according to x(t)=5.0t24.0t3 .... Problem 114CP: A cyclist sprints at the end of a race to clinch a victory. She has an initial velocity of 11.5 m/s... Problem 115CP: In 1967, New Zealander Burt Munro set the world record for an Indian motorcycle, on the Bonneville... Problem 18CQ: What is the acceleration of a rock thrown straight upward on the way up? At the top of its flight?...
Related questions
A friend of yours contends that the acceleration of a ball tossed up into the air is positive on the way up, negative as it is falling down and zero at the top of the trajectory. What is your opinion on the matter? Justify your response based on kinematic principles.
Study of objects in motion.
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