Videos
Tiffany stands at the edge of a cliff and throws a ball straight up at a certain speed and another ball straight down with the same initial speed. Neglect air resistance.
a. Which ball is in the air for the longest time?
b. Which ball has the greater speed when it strikes the ground below?
(a)
The ball in the air for the longest time.
Answer to Problem 47A
A ball which was thrown up straight which certain speed is stays in air more than ball which is thrown downward from the edge of cliff.
Explanation of Solution
Given:
Ball-1 was thrown vertically upward with certain speed
Ball-2 was thrown downward with the same speed
Formula used:
Equation of motion is,
Ball-1 thrown upward so, it travels in upward direction from edge of cliff up to the point where its speed becomes zero and then its direction of motion is change to downward.
Assume that distance traveled by ball-1 from edge of cliff to top of its track is x. Hence ball 1 traveled distance 2x more than the ball-2.
Therefore, ball-1 stays in the air more than ball-2.
Conclusion:
A ball which was thrown up straight which certain speed is stays in air more than ball which is thrown downward from the edge of cliff.
(b)
The balls having greater speed just before it strikes with ground.
Answer to Problem 47A
Ball-1 which is thrown in upward direction has more velocity just before it strikes the ground.
Explanation of Solution
Given: Ball-1 was thrown vertically upward with certain speed
Ball-2 was thrown downward with the same speed
Formula used:
Equation of motion is,
Where,
Concept:
According to equation (1), if distance travelled by an object is more, its final velocity will also be more.
From part (a), the distance travelled by ball-1 is more. So, the final velocity of ball-1 will be more when it strikes the ground in comparison to ball-2.
Conclusion:
Ball-1 has more velocity just before it strikes with ground.
Chapter 4 Solutions
CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS
Additional Science Textbook Solutions
Campbell Essential Biology (7th Edition)
Chemistry (7th Edition)
Chemistry: Structure and Properties (2nd Edition)
Organic Chemistry (8th Edition)
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Microbiology: An Introduction
- Defination of voltagearrow_forwardAt point A, 3.20 m from a small source of sound that is emitting uniformly in all directions, the intensity level is 58.0 dB. What is the intensity of the sound at A? How far from the source must you go so that the intensity is one-fourth of what it was at A? How far must you go so that the sound level is one-fourth of what it was at A?arrow_forwardMake a plot of the acceleration of a ball that is thrown upward at 20 m/s subject to gravitation alone (no drag). Assume upward is the +y direction (and downward negative y).arrow_forward
- Lab Assignment #3 Vectors 2. Determine the magnitude and sense of the forces in cables A and B. 30° 30° 300KN 3. Determine the forces in members A and B of the following structure. 30° B 200kN Name: TA: 4. Determine the resultant of the three coplanar forces using vectors. F₁ =500N, F₂-800N, F, 900N, 0,-30°, 62-50° 30° 50° F₁ = 500N = 900N F₂ = 800Narrow_forwardLab Assignment #3 Vectors Name: TA: 1. With the equipment provided in the lab, determine the magnitude of vector A so the system is in static equilibrium. Perform the experiment as per the figure below and compare the calculated values with the numbers from the spring scale that corresponds to vector A. A Case 1: Vector B 40g Vector C 20g 0 = 30° Vector A = ? Case 2: Vector B 50g Vector C = 40g 0 = 53° Vector A ? Case 3: Vector B 50g Vector C 30g 0 = 37° Vector A = ?arrow_forwardThree point-like charges are placed at the corners of an equilateral triangle as shown in the figure. Each side of the triangle has a length of 20.0 cm, and the point (A) is located half way between q1 and q2 along the side. Find the magnitude of the electric field at point (A). Let q1=-1.30 µC, q2=-4.20µC, and q3= +4.30 µC. __________________ N/Carrow_forward
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON