Concept explainers
A ball is projected horizontally from the top of a building. One second later, another ball is projected horizontally from the same point with the same velocity, (a) At what point in the motion will the balls be closest to each other? (b) Will the first ball always be traveling faster than the second? (c) What will be the time difference between them when the balls hit the ground? (d) Can the horizontal projection velocity of the second ball be changed so that the balls arrive at the ground at the same time?
Trending nowThis is a popular solution!
Learn your wayIncludes step-by-step video
Chapter 3 Solutions
COLLEGE PHYSICS,V.1-W/ENH.WEBASSIGN
Additional Science Textbook Solutions
College Physics: A Strategic Approach (4th Edition)
The Cosmic Perspective (9th Edition)
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Conceptual Physics: The High School Physics Program
Integrated Science
Physical Universe
- If a projectile is fired from the origin of the coordinate system with an initial velocity υ0 and in a direction making an angle α with the horizontal, calculate the time required for the projectile to cross a line passing through the origin and making an angle β < α with the horizontal.arrow_forwardA projectile was fired at an angle of 30.0° above the horizontal with an initial speed of 20 m/s. The same projectile was fired a second time with the sane initial speed of 20 m/s but at a different angle such that the height attained by the projectile in the second launch is one half of the horizontal distance covered by the projectile in the first launch. At what angle was the projectile launched second time?arrow_forwardConsider a projectile fired with an initial velocity perpendicular to an incline sloping downward at an angle α with respect to the horizontal. When it eventually lands on the incline, let its velocity make an angle θ with respect to the horizontal. Obtain the (a) angle θ, (b) the value of α that yields the minimum value of θ, and (c) the corresponding value of this minimum θ. (d) If a rock is thrown at the top of the same incline, what angle θ from the horizontal should rock be thrown so that it has the greatest range?arrow_forward
- A golf ball struck on earth rises to a maximum height of 60 m and hits the ground 230 m away. How high will the same golf ball travel on the moon if the magnitude and direction of its velocity are the same as they were on earth immediately after the ball was hit? Assume that the ball is hit and lands at the same elevation in both cases and that the effect of the atmosphere on the earth is neglected, so that the trajectory in both cases is a parabola. The acceleration of gravity on the moon is 0.165 times that on earth.arrow_forward"Which is an accurate statement for general projectile motion, when the projectile is at the highest point of its trajectory?" Its acceleration is zero. Its velocity is perpendicular to the acceleration. Its velocity and acceleration are both zero. The horizontal component of its velocity is zero.arrow_forwardtwo marbles are released simultaneously from the same height. Marble A is dropped freely and marble B is projected horizontally. Which of the following statement is TRUE? A. Ball A will reach the ground first. B. Ball B will reach the ground first. C. Both balls will reach the ground on the same time. D. Which balls hits the ground first depends on the magnitude of the initial velocity of ball B.arrow_forward
- A building is under construction, and a construction worker is standing on top of a 130m high elevator shaft. The worker accidentally drops his hammer down the shaft. What fraction of the total airborne time does the hammer spend in the top 75% of the falling distance?arrow_forwardIf you double the initial speed of a projectile, what happens to that projectiles range? Assume that the projectile lands at the same height from which it was launchedarrow_forwardAn orange is launched from a fruit stand at 20 m/s at an angle 25 degrees above the horizontal. The fruit stand is 1 meter high. The orange lands on another fruit stand which is also 1 meter high. How far is the second fruit stand from the first?arrow_forward
- Using the equation of the path for a projectile, Show that : at x=R/2, the height of the projectile is the maximum height h. at x=R, the projectile is on the ground; (y=0).arrow_forwardFor general projectile motion, which of the following best describes the horizontal component of a projectile's velocity? Assume air resistance is negligible. 1) The horizontal component of a projectile's velocity continually decreases. 2) The horizontal component of a projectile's velocity continually increases. 3) The horizontal component of a projectile's velocity remains a nonzero constant. 4) The horizontal component of a projectile's velocity initially decreases and then increases. 5) The horizontal component of a projectile's velocity is zero.arrow_forwardDominador, who is standing on the edge of an 80-m tall cliff facing the sea, kicks a ball horizontally at a speed of 13.01 m/s. How far from the base of the cliff will the ball hit the sea water? Let be the initial vertical position of the ball, with positive position in the upward direction. The vertical displacement of the ball from the edge of the cliff to the seawater is: meters. The time it takes for the ball to reach the seawater is: t = seconds. The horizontal distance traveled by the ball is: meters.arrow_forward
- Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning