Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

$\cdot$ Two figure skaters, one weighing 625 $\mathrm{N}$ and the other$725 \mathrm{N},$ push off against each other on frictionless ice. (a) If theheavier skater travels at 1.50 $\mathrm{m} / \mathrm{s}$ , how fast will the lighter onetravel? (b) How much kinetic energy is "created" during theskaters' maneuver, and where does this energy come from?

a) $-1.74 \mathrm{m} / \mathrm{s}$b) 180 $\mathrm{J}$

Physics 101 Mechanics

Chapter 8

Momentum

Physics Basics

Kinetic Energy

Potential Energy

Energy Conservation

Moment, Impulse, and Collisions

Rutgers, The State University of New Jersey

Hope College

University of Sheffield

University of Winnipeg

Lectures

03:23

In physics, mechanical energy is the sum of the kinetic and potential energies of a system.

04:05

In physics, a conservative force is a force that is path-independent, meaning that the total work done along any path in the field is the same. In other words, the work is independent of the path taken. The only force considered in classical physics to be conservative is gravitation.

04:19

Two figure skaters, one we…

02:48

Question number 8 Two figu…

06:09

4. Two figure skaters, one…

02:32

During an ice show, a $60.…

01:48

During an ice show, a 60.0…

08:22

An 8.00-kg block of ice, r…

An $8.00 \mathrm{~kg}$ blo…

05:59

A $65.0 \mathrm{kg}$ ice s…

01:16

Two ice-skaters $M$ and $N…

06:29

In Fig. $12-29$, two skate…

04:04

Two skaters collide and gr…

03:08

03:39

A 55.0-kg skateboarder sta…

so we have to ice skaters one ofthe 87 45 mutants on the other for fate 6 25 Mutants. We know that wait is simply mass times the traditional acceleration, which is 9.8 meters per seconds where m times 9 47 square. Hence masses simply wait, divided by 9 48 meters per second squared. Therefore, debate off the person that weighs 7 25 mutants is 7 25 by 9.8, which is 74 kilogram. In the other case, 6 25 by 9.8 is 63.8 kilograms. Now we know that they push off each other on the larger the heavier person. Most of the velocity off 1.4 meters per second. Let's say the other person walls. Let's call them the A and B Orson being most of the velocity off. Now we need to find the velocity me for party because there are no other forces in the horizontal direction. Because in order, gravitational force acts vertically, the moment of along the horizontal direction must be conserved. And the initial windham, when they, when both of them were not moving, was Ciro because simply put, their velocities are zero. And we know that the final moment must also equal the initial wanted. Because off the conservation of momentum on the final moment of is simply the mass off object B into a lost it and velocity of project e the person be less mass off course and a times velocity of force in a which is or object be. The mass is 63.8, multiplied by the velocity is less or object a the masses 74 kilograms multiplied by the velocity which is minus 1.5 seconds, and this needs to be sealed, which implies the velocity V is 74 into 1.5, divided by 63.8, which turns out to be 1.7 for meters per second. Now that we have the velocity 1.4 meters per second, we want to see the amount of kinetic energy after they have pushed off each other. So the kind total country country will simply with a kind of energy, are the first person. It's the kind of energy off the second person, which is half and the square, so that is half times mass of the first person is 74 kilograms. Well, if that were the velocity squared would be 1.5 square. Less than half as master of the second person would be 63.8 kilograms. But the place where the velocity will be 1174 squared, which turns out to be 100 and 80. Jules, I know that I have rounded it down to three significant figures because most of our numbers were given upto three significant figures. Now I know that initially when both of them are not moving the kind of man she was Ciro, that is before the pushing off the candy candy. Was Ciro Jules on? Then it went toe 1 80 Jules, the question is, where did this come from? This energy comes from They are people pushing off of each other, the work they do against each other using their muscles. That's when energy stored in their muscles when they push off of each other. Which is why they feel tired after this. On that he is converted into this Connecticut anti off 180 tools

View More Answers From This Book

Find Another Textbook

02:34

$\bullet$$\bullet$ Air-bag safety. According to safety standards for air bag…

04:46

$\bullet$ Leaping the river, A $10,000 \mathrm{N}$ car comes to a bridge dur…

04:23

$\bullet$ Three moles of an ideal gas are in a rigid cubical box with sides …

03:20

A thin uniform bar has two small balls glued to its ends. The bar is 2.00 $\…

$\cdot$ A constant horizontal pull of 8.50 $\mathrm{N}$ drags a box along a …

03:21

$\bullet$ An airplane propeller is rotating at 1900 $\mathrm{rpm.}$ (a) Comp…

10:14

$\bullet$ Three horizontal ropes are attached to a boulder and produce the p…

01:36

$\cdot$ The cornea as a thin lens. Measurements on the cornea of aperson…

06:30

$\cdot$ A racing car drives at constant speed around the horizontal track sh…

06:13

. You and your friends are doing physics experiments on afrozen pond tha…