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$\bullet$ $\bullet$ A spring of force constant 300.0 $\mathrm{N} / \mathrm{m}$ and unstretchedlength 0.240 $\mathrm{m}$ is stretched by two forces, pulling in oppositedirections at opposite ends of the spring, that increase to15.0 $\mathrm{N} .$ How long will the spring now be, and how much workwas required to stretch it that distance?

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a) 0.29 $\mathrm{m}$b) 0.375 $\mathrm{J}$

Physics 101 Mechanics

Chapter 7

Work and Energ

Physics Basics

Applying Newton's Laws

Kinetic Energy

Potential Energy

Energy Conservation

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Lectures

03:47

In physics, the kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. The kinetic energy of a rotating object is the sum of the kinetic energies of the object's parts.

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.

03:42

A spring of force constant…

01:16

An unstretched 10 cm-long …

01:28

A $35-\mathrm{N}$ force is…

01:17

One end of a spring is att…

00:44

A force of $7.33 \mathrm{N…

02:24

A spring has a natural len…

01:31

How much force is necessar…

03:14

$\bullet\bullet$ A horizon…

in question of what? B seven? I mean, Marquis with that spring is there. We just pulled on sports steps, but two forces f Yeah, it's given this 15 new Does they spring Constant? Okay. Is it cool? Toe 300 Newton meter. They could really lend all day. Spring is due in l is called 0.24 zero meters. Now, in the first part of the question, we have to find the total land off their spring when two horses are applied for this first re killed later that changing lend you to these two forces. The change England can be overturned by using hope. Slow the chance till the end is equal to f. Bye. Yeah, Substituting the values 15 bye. 300. This gives us tell her. L equals Cedo Blind Siegel by meters does the new length off the spring is And unless Delta Hello, Chizik Pronto or his melon? 0.40 meters. Yes, zero fine Siegel. Bye. It was true. Zero point nine Siegel, this is the new. We will bring them off the this spring for the party. We have to find the World Bank required to stretch. This is big work required. It is. He called. So this spring, potential energy. So have I. Yeah, that, uh, and square. This gives us half in tow. The younger into zero point 05 squared. This gives us, you know 0.37 by Jules. Is that required workmen who stressed states

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