Concept explainers
A gray kangaroo can bound across level ground with each jump carrying it 10 m from the takeoff point. Typically the kangaroo leaves the ground at a 200 angle. If this is so:
a. What is its takeoff speed?
b. What is its maximum height above the ground?
Learn your wayIncludes step-by-step video
Chapter 4 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics, Books a la Carte Edition; Student Workbook for Physics for Scientists ... eText -- ValuePack Access Card (4th Edition)
Additional Science Textbook Solutions
Applications and Investigations in Earth Science (9th Edition)
Microbiology: An Introduction
Organic Chemistry (8th Edition)
Microbiology with Diseases by Body System (5th Edition)
Campbell Essential Biology (7th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
- There are two frogs named Froggy and Jumpy. They jumped form the top of a vertical cliff. Froggy just drop and reaches the ground in 3.50 s, while Jumpy jumps horizontally with an initial speed 95 cm/s. A. How far from the base of the cliff will Jumpy hit the ground? B. How high is the vertical cliff? C. If Jumpy jumps with an angle of 30 degrees with respect to the horizontal, what should be its initial velocity for it to land on the same spot as he did when he jumped horizontally?arrow_forwardAn attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.4m/s from a height of 1.55m above the ground. a) will the rock reach the top? b) if so what is its speed at the top? if not, what initial speed must it have to reach the top? c) find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.4 m/s and moving between the same two points. d) does the change in speed of the downward moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? e) why does this agree or not agree.arrow_forwardA level-flight bomber, flying at 400 ft/s, releases a bomb at an elevation of 7500ft. a. How much time is required for the bomb to reach the ground? b. How far does it travel horizontally?arrow_forward
- More people end up in U.S. emergency rooms because of fall-related injuries than from any other cause. At what speed v would someone hit the ground who accidentally steps off the top rung of a 4.0 m tall stepladder? a. 8.9 m/s b. 7.1 m/s c. 6.2 m/s d. 8.0 m/s e. 9.8 m/s A spring gun launches a heavy steel marble with an initial speed of 19.6 m/s. How long will the steel marble be in the air? a. 6.0 s b. 2.0 s c. 3.0 s d. 5.0 s e. 4.0 s A car is traveling in a straight line along a straight, level road at 15.0 m/s when it uniformly accelerates at 3.00 m/s2 for a time of 6.00 s. How far does the car travel in this time? a. 90 m b. 54 m c. 126 m d. 162 m e. 144 marrow_forward. A stone is thrown from level zero at 30° above horizontal. It lands at the same level 20 m away.a. What is the initial speed of the stone?b. What is the maximum height that it reaches during the flight?c. How long does the whole flight take?arrow_forwardAn airplane flies horizontally at a speed of 369 km/h and drops a crate that falls to the horizontal ground below. Neglect air resistance. A. If the altitude of the plane was 628 m, then how far, horizontally in meters, did the crate move as it fell to the ground? B. What was the speed of the crate, in m/s, just before it hit the ground?arrow_forward
- A golf ball is dropped from rest from a height of 10.0 m. It hits the pavement, then bounces back up, rising just 6.0 m before falling back down again. A boy then catches the ball on the way down when it is 2.0 m above the pavement. Ignore air resistance. a. What is the velocity at which the golf ball hits the ground? b. What is its velocity at 6.0 m? c. Find out the ball's velocity when the boy catches it. d. Calculate the total amount of time that the ball is in the air, from drop to catch.arrow_forwardA juggler performs in a room whose ceiling is 3 m above the level of his hands. He throws a ball vertically upward so that it just reaches the ceiling. a. With what initial velocity does he throw the ball? b. How much time is required for the ball to reach the ceiling? 2.arrow_forward6. A ball is thrown horizontally from the top of a building 110 m high. The ball strikes the ground at a point 65 m horizontally away from and below the point of release. What is the speed of the ball just before it strikes the ground? a. 14 m/s b. 23 m/s c. 36 m/s d. 49 m/s e. 61 m/sarrow_forward
- You were standing at the edge of a vertical cliff. You horizontally throw a ball with a speed of 10 m/s. The distance from where the ball leaves your hand to the bottom of the cliff is 8 m. How far from the bottom of the cliff does the ball hit the ground. A.k.a. how tall is the cliffarrow_forward.A tennis ball is thrown straight up with an initial speed of 22.5 m/s. It is caught at the same distance above the ground.a. How high does the ball rise?b. How long does the ball remain in the air? Hint: The time it takes the ball to rise equalsarrow_forwardA ball is kicked vertically upward. It passes a speed gun placed 8 meters above the ground. The speed gun reads 4.8 m/s as it goes up. Ignore air resistance. 1. How high does the ball go before going back to the ground? 2. How long does it take to go from a height of 8.0 meters to its maximum vertical displacement? 3. What is the takeoff speed of the ball? 4. How long is the ball in the air? 5. Suppose the ball is kicked with an initial velocity similar to its takeoff speed from question 3 but is projected at an angle of 38° above the horizontal. (a) How far can it reach? (b) How high can it reach? (c) How much time will it take to go back to the ground?arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningUniversity Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University