Top left then top right then bottom left then bottom right
4:13 PM Sun OCH 6... 64% I r v education.wiley.com 6 Chapter 2: Homework 2 Question 6 of8 - / 10 E: on. Atennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 47 m/s (about 105 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same speed (47 m/s). As indicated in the diagram below, high-speed photography shows that the ball is crushed about d = 2.0 cm at the instant when its speed is momentarily zero, before rebounding. Making the very rough approximation that the large force that the wall exerts on the ball is approximately constant during contact, determine the approximate magnitude of this force. Part 1 (a) What is the average speed of the ball during the period from rst contact with the wall to the moment the ball's speed is momentarily zero? _> | 1 U avg Save for Later Attempts: 0 of4 used Part 2 (b) How much time elapses between rst contact with the wall, and coming to a stop? Ar = n 5 Save for Later Attempts: 0 of4 used Part 3 4:13 PM Sun Oct 1 n I n 7 L 64% E], education.wiley.com 6 Chapter 2: Homework 2 Question 6 of8 - / 10 E: Attempts: 0 of4 used on. Part 2 (b) How much time elapses between rst contact with the wall, and coming to a stop? At = n 5 Save for Later Attempts: 0 of4 used Part 3 (c) What is the magnitude of the average force exerted by the wall on the ball during contact? _> IF avg = n N Save for Later Attempts: 0 of4 used Part 4 (cl) In contrast, what is the magnitude of the gravitational force of the Earth on the ball? mg = n N eTextbook and Media Save for Later Attempts: 0 of4 used 4:13 PM Sun Oct 1 64% M Chapter 2: Hon X Ask a Question X d ckumarad's pre X Free Asti WP Question 7 of 8 X F C education.wiley.com 6 . . . m Save for Later Attempts: 0 of4 used Part 2 w=
kg-m/s eTextbook and Media Save for Later Attempts: 0 of4 used 4:15 PM Sun Oct1 --- . L 63%:Jr education.wiley.com 6 Chapter 2: Homework 1 Question 8 of10 - / 10 E on. Current Attempt in Progress You throw a nerf basketball of mass 0.002 kg into the air. Att : 0, the ball leaves your hand.Att : 0.10 s, the net force on the ball is (0.0203, 0.0248, 0) N, its velocity is (1.87, 0.84, 0) III/S, and its position is (0.325, 0.300, 0) m. (Besides the gravitational force by Earth, air also exerts a force on the ball.) Part 1 What will be its position at t = 0.12 s? 7') = m Save for Later Attempts: 0 of4 used Part 2 At t =0.12 s, the net force on the ball is now (0.0149, 0.0213, 0) What will be its position at t = 0.14 7: m ,n ,n >m eTextbook and Media Save for Later Attempts: 0 of4 used Submit Ansv E 4115 PM Sun Oct 1 '7 L 63% I m Chapter 2: r Ask a Quest 0 ckumarad's E Free Asti Question 9 of X -l- 6 Cl educationwileycom Q; ['1'] @ ... 6 Chapter 2: Homework 1 Question 9 oflO - / 10 E at. View Policies Current Attempt in Progress Suppose you are navigating a spacecraft far from other objects. The mass of the spacecraft is 2.7 X 104 kg (about 27 tons). The rocket engines are shut off, and you're coasting along with a constant velocity of km/s. As you pass the location km you briey re side thruster rockets, so that your spacecraft experiences a net force of N for 19.0 s. The ejected gases have a mass that is small compared to the mass of the spacecraft. You then continue coasting with the rocket engines turned off. Where are you an hour later? (Think about what approximations or simplifying assumptions you made in your analysis. Also think about the choice of system: what are the surroundings that exert external forces on your system?) _) eTextbook and Media Save for Later Attempts: 0 of 4 used 4115 PM Sun Oct 1 '7 L 63% I m Chapter 2: I- Ask a Questl O ckumarad's E Free Astl Question 10 0 X -l- 6 Cl education.wiley.com Q) ['1'] @ ... 6 Chapter 2: Homework 1 Question 10 of 10 m with velocity m/s. At this low velocity air resistance is negligible. Using the iterative method shown in Section 2.4 with a time step of 0.05 s, calculate step by step the position and velocity of the block at t : 0.05 5,1 : 0.10 s, and t : 0.15 5. (Express your answers in vector form.) Part 1 (a)7'(r = 0.055) = m/s Save for Later Attempts: 0 of4 used Part 3 4:15 PM Sun Oct1 ... ... L 63%:1' education.wiley.com 6 Chapter 2: Homework 1 Question100f10 m/s Save for Later Attempts: 0 of4 used Part 5 (e)?(t = 0.155) = m/s 4:15 PM Sun Oct 1 . . . 63% education.wiley.com Chapter 2: Homework 1 Question 7 of 10 <>
