Cord Tie

multiple choice, what's the answer?

A woman performs a 'bungee jump', falling from a bridge with a length of elastic cord tied around her ankles. The gravitational potential energy of lost by the jumper at the lowest point has been transferred as:
A elastic strain energy in the cord.
B elastic strain energy and internal energy in the cord
C kinetic energy of the jumper OR
D kinetic energy of the jumper plus internal energy in the cord.

With reasons please. Thanks a lot.

Like all multiple choice you have to read carefully. The key bit is "at the lowest point".

At the lowest point the jumper has no velocity as their velocity is right at the point between going down and going up. So they have no kinetic energy. This rules out C and D.

Most of the energy will be transfered to the strain energy is the cord so it is A or B. However the transfer is not perfect and there will also be heat generated. Not sure what is meant by "internal energy in the cord" I would argue this includes heat in the cord. On that basis I would go with answer "B".

Discover Cord Tie On eBay Below:

BOXER TOOLS 3 8 x 125 MASTER MECHANIC BULK ROLL BUNGEE TIE DOWN CORD
BOXER TOOLS 3 8 x 125 MASTER MECHANIC BULK ROLL BUNGEE TIE DOWN CORD
$39.99
4 ea BOXER TOOL 3 8 x 125 MASTER MECHANIC BULK ROLLS BUNGEE TIE DOWN CORD
4 ea BOXER TOOL 3 8 x 125 MASTER MECHANIC BULK ROLLS BUNGEE TIE DOWN CORD
$129.99
24 SUPER THICK BUNGEE CORDS TIE DOWN CORDS 36 LENGTH
24 SUPER THICK BUNGEE CORDS TIE DOWN CORDS 36 LENGTH
$28.99
24 SUPER THICK BUNGEE CORDS TIE DOWN 24 LENGTH
24 SUPER THICK BUNGEE CORDS TIE DOWN 24 LENGTH
$25.99
24 SUPER THICK BUNGEE CORDS TIE DOWN 48 LENGTH
24 SUPER THICK BUNGEE CORDS TIE DOWN 48 LENGTH
$31.99
CAL HAWK 24 HEAVY DUTY ELASTIC TIE DOWN BUNGEE CORDS 10 PIECES ATD24A
CAL HAWK 24 HEAVY DUTY ELASTIC TIE DOWN BUNGEE CORDS 10 PIECES ATD24A
$8.49
50x Heavy Duty Weather Resistant Nylon Green Zip Ties Wraps For Wire Cable Cord
50x Heavy Duty Weather Resistant Nylon Green Zip Ties Wraps For Wire Cable Cord
$2.57
200 Nylon Weather Resistant Self Locking Cable Wire Ties Zip Cord Straps Green
200 Nylon Weather Resistant Self Locking Cable Wire Ties Zip Cord Straps Green
$6.17
500PCS 12 White Plastic Cable Ties Network Cable Cord Wire Strap 60 Lbs
500PCS 12 White Plastic Cable Ties Network Cable Cord Wire Strap 60 Lbs
$18.49
Pack of 500 4 White Plastic Cable Ties Network Cable Cord Wire Strap 18 Lbs
Pack of 500 4 White Plastic Cable Ties Network Cable Cord Wire Strap 18 Lbs
$7.99
10PC 24 Heavy Duty Bungee Cords 24 inch Long Bungee Thick Tie Downs w Hooks
10PC 24 Heavy Duty Bungee Cords 24 inch Long Bungee Thick Tie Downs w Hooks
$22.95
50 PC 12 Heavy Duty Bungee Cords 12 inch Thick Tie Downs w Hooks CAL HAWK BRAND
50 PC 12 Heavy Duty Bungee Cords 12 inch Thick Tie Downs w Hooks CAL HAWK BRAND
$90.00
100pcs 25100mm Label tie Network Cable Cord Wire Strap Zip Nylon
100pcs 25100mm Label tie Network Cable Cord Wire Strap Zip Nylon
$0.99
50 PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
50 PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
$215.00
20PC 24 Heavy Duty Bungee Cords 24 inch Long Bungee Thick Tie Downs w Hooks
20PC 24 Heavy Duty Bungee Cords 24 inch Long Bungee Thick Tie Downs w Hooks
$23.99
100PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
100PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
$375.00
100 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap Zip Ties Nylon
100 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap Zip Ties Nylon
$6.00
1 Auto Solutions 24 Adjustable TIE DOWN BUNGEE CORD Steel Hook Max Length 40
1 Auto Solutions 24 Adjustable TIE DOWN BUNGEE CORD Steel Hook Max Length 40
$2.99
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
$10.50
Bungee Cord SET OF 3 heavy duty 36 48 64 inch tie down with metal hooks
Bungee Cord SET OF 3 heavy duty 36 48 64 inch tie down with metal hooks
$12.99
200pcs a lot 3X150MM White Cable Cord Wire Tie Strap Zip Nylon With Stopper
200pcs a lot 3X150MM White Cable Cord Wire Tie Strap Zip Nylon With Stopper
$1.99
20PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
20PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
$21.99
New 100 Pc 7 38 White Network Cable Cord Wire Tie Strap 75 Lbs Zip Nylon
New 100 Pc 7 38 White Network Cable Cord Wire Tie Strap 75 Lbs Zip Nylon
$4.59
250pcs Pack 12 inch White Network Cable Cord Wire Strap Zip Tie Nylon 28300mm
250pcs Pack 12 inch White Network Cable Cord Wire Strap Zip Tie Nylon 28300mm
$10.44
500pcs 8 inch White Network Cable Cord Wire Strap Zip Tie Nylon 35200mm
500pcs 8 inch White Network Cable Cord Wire Strap Zip Tie Nylon 35200mm
$16.62
100PCS 8 3x200mm Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap
100PCS 8 3x200mm Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap
$2.55
250X Pack White Network Cable Cord Wire Strap Zip Tie Nylon 51250mm durable
250X Pack White Network Cable Cord Wire Strap Zip Tie Nylon 51250mm durable
$15.68
200pcs 12inch Cord Wire Network Cable Zip Nylon Tie Strap Wrap 50 LBS Tensile
200pcs 12inch Cord Wire Network Cable Zip Nylon Tie Strap Wrap 50 LBS Tensile
$10.49
100pcs 8inch Cord Wire Network Cable Zip Nylon Tie Strap Wrap 40 LBS Tensile
100pcs 8inch Cord Wire Network Cable Zip Nylon Tie Strap Wrap 40 LBS Tensile
$2.99
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 36 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 36 long
$8.99
20PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
20PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
$21.25
20 48 Heavy Duty Hook Bungee Cords 48 inch Long Bungee Thick Tie Down Bungees
20 48 Heavy Duty Hook Bungee Cords 48 inch Long Bungee Thick Tie Down Bungees
$30.25
50x Heavy Duty Weather Resistant Nylon Green Zip Ties Wraps For Wire Cable Cord
50x Heavy Duty Weather Resistant Nylon Green Zip Ties Wraps For Wire Cable Cord
$3.11
12 36 HEAVY DUTY BLACK HOOK BUNGEE CORD TIE DOWN STRAP 12 PC SET
12 36 HEAVY DUTY BLACK HOOK BUNGEE CORD TIE DOWN STRAP 12 PC SET
$16.49
100 PCS Pack 12 inch Black Network Cable Cord Wire Tie Strap 60 Lbs Zip Nylon
100 PCS Pack 12 inch Black Network Cable Cord Wire Tie Strap 60 Lbs Zip Nylon
$5.95
1000 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap 50 Lbs Zip Nylon
1000 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap 50 Lbs Zip Nylon
$16.88
100 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap 50 Lbs Zip Nylon in
100 PCS Pack 8 inch White Network Cable Cord Wire Tie Strap 50 Lbs Zip Nylon in
$3.17
100pcs 8 3x200mm Black Locking Nylon Plastic Cable Wire Zip Ties Cord Wrap
100pcs 8 3x200mm Black Locking Nylon Plastic Cable Wire Zip Ties Cord Wrap
$2.90
100pcs NEW 4 inch colorized Network Cable Cord Wire Strap Zip Tie Nylon 2100mm
100pcs NEW 4 inch colorized Network Cable Cord Wire Strap Zip Tie Nylon 2100mm
$0.92


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