As you are driving to school one day, you pass a construction site of a new building and you stop to watch for a few minutes. A crane is lifting a batch of bricks on a pallet to an upper floor of the building. Suddenly a brick falls off the rising pallet. You measure the time it takes for the brick to hit the ground and you find it to be 2.5 seconds. The crane has height markings. You saw the brick fell off the pallet at a height of 30.7 meters above the ground. A falling brick can be dangerous, and you wonder how fast the brick was moving when it hit the ground. Since you are taking physics, you quickly calculate the answer.

As you are driving to school one day, you pass a construction site of a new building and you stop to watch for a few minutes. A crane is lifting a batch of bricks on a pallet to an upper floor of the building. Suddenly a brick falls off the rising pallet. You measure the time it takes for the brick to hit the ground and you find it to be 2.5 seconds. The crane has height markings. You saw the brick fell off the pallet at a height of 30.7 meters above the ground. A falling brick can be dangerous, and you wonder how fast the brick was moving when it hit the ground. Since you are taking physics, you quickly calculate the answer.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Introduction And Vectors

Section: Chapter Questions

Problem 23P

See similar textbooks

Similar questions

A student witnesses a flash of lightning and then t = 1.5 s later the student hears the associated clap of thunder.Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters? Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the lightning strike?
The following data were taken on five cars traversing a 1.6-km highway. Car Time (minutes) A 1.9 B 1.2 C 1.8 D 1.1 E 1.9 Determine the traffic density, in vehicles per km. Express your answer in 2 decimal places.
A car is traveling at 30 m/s ( approximately 67 mph) on I-95 highway. The driver applies the brakes and the car comes to a stop in 4.0 s . What is the car's acceleration, in m/s2? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed.
A train is going on a journey. First it travels east for 50 kilometers. Then it turns north and travels for 22 kilometers. Next it goes west for 50 kilometers. Finally, it travels south for a certain number of kilometers. At the end of its journey it is back at its original location. How many kilometers did it travel in the southward direction?
A scientist drops two balls A and B from the same height. Ball A falls 4 meters in the 1st second, 9 meters in the 2nd second, 14 meters in the 3rd second, and so on. Ball B falls 3.5 meters in the 1st second, 6.5 meters in the 2nd second, 9.5 meters in the 3rd second, and so on. How many meters would each ball fall in 10 seconds?
To get to his office from home, Greg walks 5 blocks north and then 2 blocks east. After work he meets some friends at a cafe; to get there he walks 3 blocks south and 6 blocks west. All blocks are 660 feet long. What is the straight-line distance from the cafe to his home? Express your answer in feet.
An astronaut on the moon throws a baseball upward. The astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 50 ft per sec. The heights of the ball in feet is given by the equation s= -2.71² +50t+6.5, where t is the number of seconds after the ball was thrown. Complete parts a and b. a. After how many seconds is the ball 18 ft above the moon's surface? After seconds the ball will be 18 ft above the moon's surface. (Round to the nearest hundredth as needed. Use a comma to separate answers as needed.) ents Librar ccess 4 Help me solve this View an example Get more help. Check answer ▬ J 38 insert FG Q A Z → 2 W S alt x # 3 E D DII C $ 4 R 2 F FS V %6 5 T G ^ 6 B F7 Y H & 7 8 N (DELL FR J 8 F9 M 00 к prt sc F10 10 9 Clear all O " alt home ) O L F11 P end ctrl : F12 1 [ 0 + ? / = 66 delete } 1
George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed per second?
You hopefully used g=9.8 m/s2 (or thereabouts). That is the gravitational acceleration near the earth's surface. if you rise high above the earth, the gravitational acceleration decreases. Specifically, the gravitational acceleration is inversely proportional to the square of the distance from the earth's center. Equivalently, if you multiply the acceleration by the distance from the earth's center, you should get the same number for all heights. For this problem, take the radius of the earth as 3,902 miles, and calculate the gravitational acceleration of a satellite in low orbit, 182 miles above the surface.
An astronaut on the moon throws a baseball upward. The astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 50 ft per sec. The height s of the ball in feet is given by the equation s = - 2.7t + 50t + 6.5, where t is the number of seconds after the ball was thrown. Complete parts a and b. a. After how many seconds is the ball 16 ft above the moon's surface? After seconds the ball will be 16 ft above the moon's surface. (Round to the nearest hundredth as needed. Use a comma to separate answers as needed.)
A car is going 19 m/s for 27 s. Draw an accurate graph showing the distance versus time for the car. d (m) d (m) 1000 O 800 600 400 200 d (m) 1000 800 600 400 200 What is the slope? m/s 5 5 10 10 15 20 15 20 25 25 t (s) t (s) O 500 400 300 200 O 100 d (m) 500 400 300 200 100 5 5 10 15 10 15 20 20 25 25 t(s) t(s)
Mario rides his motorcycle in going to school. He drives at an average speed of 30 kilometers per hour. The distance between his house and the school is 15 kilometers. Every time he sees his best friend Jessica walking on the road, he invites her for a ride and lowers his speed. On the other hand, he increases his speed when he wakes up late for school. a) If x represents the time it takes Mario to drive to school with the given distance of 15 kilometers, how will you represent the relationship of his speed (y) versus the time (x)?