Problem 1FTD: Under what conditions are average and instantaneous velocity equal? Problem 2FTD: Does a speedometer measure speed or velocity? Problem 3FTD: You check your odometer at the beginning of a days driving and again at the end. Under what... Problem 4FTD: Consider two possible definitions of average speed: (a) the average of the values of the... Problem 5FTD: Is it possible to be at position x = 0 and still be moving? Problem 6FTD: Is it possible to have zero velocity and still be accelerating? Problem 7FTD: If you know the initial velocity v0 and the initial and final heights y0 and y, you can use Equation... Problem 8FTD: In which of the velocity-versus-time graphs shown in Fig. 2.14 would the average velocity over the... Problem 9FTD: If you travel in a straight line at 50 km/h for 1 h and at 100 km/h for another hour, is your... Problem 10FTD: If you travel in a straight line at 50 km/h for 50 km and then at 100 km/h for another 50 km, is... Problem 11E: In 2009, Usain Bolt of Jamaica set a world record in the 100-m dash with a time of 9.58 s. What was... Problem 12E: Earth’s diameter is approximately 8000 miles. Estimate the speed of a point on Earth’s equator as... Problem 13E: Starting front home, you bicycle 24 km north in 2.5 h and then turn around and pedal straight home... Problem 14E: The Voyager 1 spacecraft is expected to continue broadcasting data until at least 2020, when it will... Problem 15E Problem 16E: Whats the conversion factor from meters per second to miles per hour? Problem 17E: On a single graph, plot distance versus time for the first two trips from Houston to Des Moines... Problem 18E: For the motion plotted in Fig. 2.15, estimate (a) the greatest velocity in the positive x-direction,... Problem 19E: A model rocket is launched straight upward. Its altitude y as a function of time is given by y = bt ... Problem 20E: You’re driving at the 50 km/h speed limit when you spot a sign showing a speed-limit increase to 90... Problem 21E: Starting from rest, a subway train first accelerates to 25 m/s, then brakes. Forty-eight seconds... Problem 22E Problem 23E: An egg drops from a second-story window, taking 1.12 s to fall and reaching 11.0 m/s just before... Problem 24E: An airplanes takeoff speed is 320 km/h. If its average acceleration is 2.9 m/s2, how much time is it... Problem 25E: ThrustSSC, the worlds first supersonic car, accelerates from rest to 1000 km/h in 16 s. Whats its... Problem 26E: Youre driving at 70 km/h when you apply constant acceleration to pass another car. Six seconds... Problem 27E Problem 28E Problem 29E Problem 30E: Starting from rest, a car accelerates at a constant rate, reaching 88 km/h in 12 s. Find (a) its... Problem 31E: A car moving initially at 50 mi/h begins slowing at a constant rate 100 ft short of a stoplight. If... Problem 32E: In a medical X-ray tube, electrons are accelerated to a velocity of 108 m/s and then slammed into a... Problem 33E: Californias Bay Area Rapid Transit System (BART) uses an automatic braking system triggered by... Problem 34E: Youre driving at speed v0 when you spot a stationary moose on the road, a distance d ahead. Find an... Problem 35E Problem 36E: Your friend is sitting 6.5 m above you on a tree branch. How fast should you throw an apple so it... Problem 37E: A model rocket leaves the ground, heading straight up at 49 m/s. (a) Whats its maximum altitude?... Problem 38E: A foul ball leaves the bat going straight up at 23 m/s. (a) How high does it rise? (b) How long is... Problem 39E: A Frisbee is lodged in a tree 6.5 m above the ground. A rock thrown from below must be going at... Problem 40E: Space pirates kidnap an earthling and hold him on one of the solar systems planets. With nothing... Problem 41E: Example 2.3: A jetliner touches down at 288 km/h. The plane then decelerates (i.e., undergoes... Problem 42E Problem 43E Problem 44E Problem 45E: Example 2.5: A diver drops from a 9.21-m high cliff. (a) At what speed does she enter the water? and... Problem 46E Problem 47E Problem 48E Problem 49P: You allow 40 min to drive 25 mi to the airport, but youre caught in heavy traffic and average only... Problem 50P Problem 51P: You can run 9.0 m/s, 20% faster than your brother. How much head start should you give him in order... Problem 52P Problem 53P: An objects position is given by x = bt + ct3 where b = 1.50 m/s, c = 0.640 m/s3, and t is time in... Problem 54P: An objects position as a function of time t is given by x = bt4, with b a constant. Find an... Problem 55P: In a 400-m drag race, two cars start at the same time, and each maintains a constant acceleration.... Problem 56P: Squaring Equation 2.7 gives an expression for v2. Equation 2.11 also gives an expression for v2.... Problem 57P: During the complicated sequence that landed the rover Curiosity on Mars in 2012, the spacecraft... Problem 58P: The position of a car in a drag race is measured each second, and the results are tabulated below.... Problem 59P: A fireworks rocket explodes at a height of 82.0 m, producing fragments with velocities ranging from... Problem 60P: The muscles in a grasshoppers legs can propel the insect upward at 3.0 m/s. How high can the... Problem 61P: On packed snow, computerized antilock brakes can reduce a cars stopping distance by 55%. By what... Problem 62P: A particle leaves its initial position x0 at time t = 0, moving in the positive x-direction with... Problem 63P: A hockey puck moving at 32 m/s slams through a wall of snow 35 cm thick. It emerges moving at 18... Problem 64P Problem 65P: A jetliner touches down at 220 km/h and comes to a halt 29 s later. Whats the shortest runway on... Problem 66P: A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.3... Problem 67P: A racing car undergoing constant acceleration covers 140 m in 3.6 s. (a) If its moving at 53 m/s at... Problem 68P: The maximum braking acceleration of a car on a dry road is about 8 m/s2. If two cars move head-on... Problem 69P: After 35 min of running, at the 9-km point in a 10-km race, you find yourself 100 m behind the... Problem 70P: Youre speeding at 85 km/h when you notice that youre only 10 m behind the car in front of you, which... Problem 71P: Airbags cushioned the Mars rover Spirits landing, and the rover bounced some 15 m vertically after... Problem 72P: Calculate the speed with which cesium atoms must be tossed in the NIST-F1 atomic clock so that their... Problem 73P: A falling object travels one-fourth of its total distance in the last second of its fall. From what... Problem 74P: Youre on a NASA team engineering a probe to land on Jupiters moon to, and your job is to specify the... Problem 75P: Youre atop a building of height h, and a friend is poised to drop a ball from a window at h/2. Find... Problem 76P: A castles defenders throw rocks down on their attackers from a 15-m-high wall, with initial speed 10... Problem 77P: Two divers jump from a 3.00-m platform. One jumps upward at 1.80 m/s, and the second steps off the... Problem 78P: A balloon is rising at 10 m/s when its passenger throws a ball straight up at 12 m/s relative to the... Problem 79P: In 2014 the Philae spacecraft became the first artifact to land on a comet. Unfortunately, Philae... Problem 80P: Youre at mission control for a rocket launch, deciding whether to let the launch proceed. A band of... Problem 81P: Youre an investigator for the National Transportation Safety Board, examining a subway accident in... Problem 82P Problem 83P: Consider an object traversing a distance L, part of the way at speed v1 and the rest of the way at... Problem 84P Problem 85P: Ice skaters, ballet dancers, and basketball players executing vertical leaps often give the illusion... Problem 86P: Youre staring idly out your dorm window when you see a water balloon fall past. If the balloon takes... Problem 87P: A police radars effective range is 1.0 km, and your radar detectors range is 1.9 km. Youre going 110... Problem 88P: An object starts moving in a straight line from position x0, at time t = 0, with velocity v0. Its... Problem 89P: Youre a consultant on a movie set, and the producer wants a car to drop so that it crosses the... Problem 90P: (a) For the ball in Example 2.6, find its velocity just before it hits the floor, (b) Suppose you... Problem 91P: Your roommate is an aspiring novelist and asks your opinion on a matter of physics. The novels... Problem 92P Problem 93P: Derive Equation 2.10 by integrating Equation 2.7 over time Youll have to interpret the constant of... Problem 94P: An objects acceleration increases quadratically with time; a(t) = bt2, where b = 0.041 m/s4. If the... Problem 95P: An object’s velocity as a function of time is given by , where b and c are positive constants with... Problem 96P: An objects acceleration decreases exponentially with time: a(t) = a0ebt, where a0 and b are... Problem 97P: A ball is dropped from rest at a height li0 above the ground. At the same instant, a second ball is... Problem 98PP: A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and... Problem 99PP: A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and... Problem 100PP: A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and... Problem 101PP: A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and... Problem 102PP: A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and... format_list_bulleted