Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 4, Problem 18P
(a)
To determine
The constant force that must be exerted on the fullback to bring him to rest.
(b)
To determine
The initial speed of the fullback.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A 68 kg man drops to a concrete patio from a window 0.45 m above the patio. He neglects to bend his knees on landing, taking 2.4 cm to stop.
(a) What is his average acceleration from when his feet first touch the patio to when he stops?(b) What is the magnitude of the average stopping force exerted on him by the patio?
A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop.
(a) What will be the car's stopping distance for dry pavement ( = 0.85)?
(b) What will be the car's stopping distance for wet pavement ( = 0.60)?
A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?
Chapter 4 Solutions
Physics Fundamentals
Ch. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Prob. 4QCh. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Prob. 9QCh. 4 - Prob. 10Q
Ch. 4 - Prob. 11QCh. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11PCh. 4 - Prob. 12PCh. 4 - Prob. 13PCh. 4 - Prob. 14PCh. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - Prob. 20PCh. 4 - Prob. 21PCh. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - Prob. 24PCh. 4 - Prob. 25PCh. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Prob. 29PCh. 4 - Prob. 30PCh. 4 - Prob. 31PCh. 4 - Prob. 32PCh. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - Prob. 35PCh. 4 - Prob. 36PCh. 4 - Prob. 37PCh. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40PCh. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - Prob. 45PCh. 4 - Prob. 46PCh. 4 - Prob. 47PCh. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - Prob. 50PCh. 4 - Prob. 51PCh. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - Prob. 56P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- (b) A frictionless incline is 5.00 m long (the distance from the top of the incline to the bottom, measured along the incline). The vertical distance from the top of the incline to the bottom is 1.66 m. A small block is released from rest at the top of the incline and slides down the incline. (i) How long does it take the block to reach the ground? 3.25 s (ii) What is the speed of the block just before it strikes the ground? 1.75 m/sarrow_forwardA 7500-kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.25 m / s2 and feels no appreciable air resistance. When it has reached a height of 525 m, its engines suddenly fail; the only force acting on it is now gravity. (a) What is the maximum height this rocket will reach above the launch pad? (b) How much time will elapse after engine failure before the rocket comes crashing down to the launch pad, and how fast will it be moving just before it crashes? (c) Sketch ay-t, vy-t, and y-t graphs of the rocket's motion from the instant of blast-off to the instant just before it strikes the launch pad.arrow_forwardA ball with mass 0.15 kg is thrown upward with initial velocity 20 m/s from the roof of a building 30 m high. There is a force due to air resistance of v2/1325 , where the velocity v is measured in m/s. (a) Find the maximum height above the ground that the ball reaches. (b) Find the time that the ball hits the ground. Step by step solution please.arrow_forward
- The driver of a car traveling at a speed of 18 m/s slams on the brakes and comes to a stop in 4 s. If we assume that the car's speed changed at a constant rate (constant net force): (a) What was the car's average speed during this 4 s interval? (b) How far did the car go in this 4 s interval?arrow_forwardA 116 kg fullback runs at the line of scrimmage. (a) Find the constant force that must be exerted on him to bring him to rest in a distance of 1.5 m in a time interval of 0.23 s. 6942 6 N x opposite the fullback's direction of motion (b) How fast was he running initially? 13.04 m/s 4arrow_forwardThe front 1.20 m of a 1550 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 30.0 m/s stops uniformly in 1.20 m, how long does the collision last? (b) What is the magnitude of the average force on the car? (c) What is the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity. (Indicate the direction with the sign of your answer.)arrow_forward
- A body of mass 2 slugs is dropped from a height of 450 ft with an initial velocity of 10 ft/sec. Assuming no air resistance, find the time required for the body to hit the ground. Select the correct response: 5 s 10 s 15 s 20 sarrow_forwardLex Luthor has dropped Lois Lane (initial velocity 0, mass 65.30 kg) from the top of a building of height 385 m. Fortunately, Superman flies to catch her 9.10 m before she hits the ground. (a) Ignoring air resistance, how fast is Lois moving when Superman catches her? (enter as negative if downwards) (b) What acceleration must Superman give to Lois if he is to stop her before she hits the ground? (enter as negative if downwards) (c) Not forgetting that Lois also has weight, what force must Superman apply to stop her from hitting? (enter as negative if downwards)arrow_forwardA particle of mass 5.30 kg is acted on by a single force of 32.2 N. If the particle starts at rest, how far does it travel in the first 15.0 s?arrow_forward
- The front 1.20 m of a 1,600-kg car is designed as a "crumple zone" that coltapses to absorb the shock of a collision. (a) If a car traveling 23.0 m/s stops uniformly in 1.20 m, how long does the collision last? (b) What is the magnitude of the average force on the car? (C) What is the magnitude of the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity.arrow_forwardThe acceleration of a mass is given by a=3+2t, What is the initial velocity if x(1)=x((0)?arrow_forwardA bowling ball weighing 61.5 N initially moves at a speed of 4.00 m/s. How long must a force of 42.5 N be applied to the ball to stop it?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillClassical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY