Concept explainers
If you toss a ball upward with a certain initial speed, it falls freely and reaches a maximum height h a time t after it leaves your hand. (a) If you throw the ball upward with double the initial speed, what new maximum height does the ball reach? (i)
Learn your wayIncludes step-by-step video
Chapter 2 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
Conceptual Physics (12th Edition)
The Cosmic Perspective
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Essential University Physics: Volume 1 (3rd Edition)
Cosmic Perspective Fundamentals
An Introduction to Thermal Physics
- You throw a tennis ball straight up. Air resistance can be neglected. (a) The maximum height above your hand that the ball reaches is H. At what speed does the ball leave your hand? (b) What is the speed of the ball when it is a height H/2 above your hand? Express your answer as a fraction of the speed at which it left your hand. (c) At what height above your hand is the speed of the ball half as great as when it left your hand? Express your answer in terms of H.arrow_forward6arrow_forwardYou throw a football straight up. Air resistance can be neglected. (a) When the football is 4.00 m above where it left your hand, it is moving upward at 0.500 m>s. What was the speed of the football when it left your hand? (b) How much time elapses from when the football leaves your hand until it is 4.00 m above your hand?arrow_forward
- A parachutist after bailing out falls 50 m without friction. When the parachute opens, it decelerates at 2 m/s2. He reaches the ground with a speed of 3 m/s. At what height, did he bailout? (a) 293 m (b) 111 m (c) 91 m (d) 182 marrow_forwardA 0.54-kg ball is thrown vertically upward with an initial speed of 14.0 m/s. What is the speed of the ball when it hastravelled three-quarters of the distance to its maximum height?arrow_forwardThe ceiling of a classroom is 3.00 m above the floor. A student tosses an apple vertically upward, releasing it 0.55 m above the floor. What is the maximum initial speed that can be given to the apple if it is not to touch the ceiling?arrow_forward
- If you toss a ball upward with a certain initial speed, it falls freely and reaches a maximum height h at a time t after it leaves your hand. Suppose you throw the ball upward with double the initial speed. What new maximum height does the ball reach? O (1.41)h O 8h O 16h O 2h O 4harrow_forwardAt t=0, a particle starts with an initial velocity of 10 i m/s and accelerates uniformly at (-2.0 i +4.0 J) m/s^2. What is the speed of particle at t=5s? 1- 32m/s 2- 30 m/s 3- 28 m/s 4- 20 m/s 5- 10 m/sarrow_forwardThe Summit Plummet is an extreme water slide—one of the steepest and fastest in the world. Riders drop 36 m from the start until they hit a run-out at the bottom. If you give yourself a good push at the start, so that you begin your plunge moving at 2.0 m/s, how fast are you moving when you get to the bottom? How fast would you be moving if you skipped the push? The slide is steep and slippery, so assume that you can ignore friction and drag forces.arrow_forward
- A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d = 2.68m, and x and y are measured in meters as usual. Suppose the block starts on the track at x = 0. What minimum initial velocity (moving to the right) must the block have such that it will leave the track at x = 0 and go into freefall? 7.25 m/s 5.13 m/s 9.90 m/s 12.02 m/sarrow_forwardA student at the top of a building of height h throws one ball upward with a speed of i and then throws a second ball downward with the same initial speed i. Just before it reaches the ground, is the final speed of the ball thrown upward (a) larger, (b) smaller, or (c) the same in magnitude, compared with the final speed of the ball thrown downward?arrow_forwardA ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.12 s later. You may ignore air resistance. If the height of the building is 20.4 m, what must the initial speed be of the first ball if both are to hit the ground at the same time? Consider the same situation, but now let the initial speed v0 of the first ball be given and treat the height h of the building as an unknown. What must the height of the building be for both balls to reach the ground at the same time for v0 = 8.50 m/s. If v0 is greater than some value vmax, a value of h does not exist that allows both balls to hit the ground at the same time. Solve for vmax. If v0 is less than some value vmin, a value of h does not exist that allows both balls to hit the ground at the same time. Solve for vmin.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning