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Chrome File Edit View History Bookmarks Window People Help 8396 C%) Fri 7:24 PM Q E file:///Users/johnajero 1 /Desktop/Screen%20Shot%202015-02-27%20a1%207.23.13%20PM.png Please Help Me. Part A What Is The Total Work Wfric | Chegg.com Screen Shot 2015-02-27 at 7.23.13 PM.png 1,280x800 pixels Problem 6.42 Part B A 65kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 15m, and falls a total of 36m . Calculate the maximum acceleration she experiences Express your answer using two significant figures. m/s MasteringPhysics: Chapter 6 a https://session.masteringphysics.com/myct/itemView?assignmentProblemID-44701811 Physics 120-3544 Spring 2015 Chapter 6 Problem 6.60 Signed in as J Problem 6.60 Part A A 1600kg sports car accelerates from rest to 85km/h in 6.7s What is the average power delivered by the engine? Express your answer using two significant figures. Submit My Answers Give Up @6 'W ?

Explanation / Answer

Here ,

For the jumper ,

mg = kx

65*9.8 = k*(36 - 15)/2

k = 60.67 N/m

Now ,

w = sqrt(k/m)

w = sqrt(60.67/65)

w = 0.966 rad/s

Now ,

Amax = w^2 * A

Amax = 0.966^2 * (36-15)/2

Amax = 9.8 m/s^2

the maximum acceleration is 9.8 m/s^2

2)

Here ,

u = 85 km/h = 23.61 m/s

Using work energy theorum

Work done = 0.5 * 1600*23.61^3

Power = work done / time

Power =   0.5 * 1600*23.61^3 /6.7

Power = 66565.3 W

the power delivered by engine is 66565.3 W

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