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:

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
100 Pcs 3mm Width 200mm Length Yellow Nylon Cable Ties Wire Cord Strap
100 Pcs 3mm Width 200mm Length Yellow Nylon Cable Ties Wire Cord Strap
$4.78
100 PK 6 Ball Bungee Canopy Tarp Tie Down Cord Black
100 PK 6 Ball Bungee Canopy Tarp Tie Down Cord Black
$24.99
Pack of 10 8 Black Hook and Loop Fastener Cable Tie Down Straps Reusable Cord H
Pack of 10 8 Black Hook and Loop Fastener Cable Tie Down Straps Reusable Cord H
$10.29
100 Pcs 3mm Width 200mm Length Teal Blue Nylon Cable Ties Wire Cord Strap
100 Pcs 3mm Width 200mm Length Teal Blue Nylon Cable Ties Wire Cord Strap
$4.77
100 Pcs 3mm Width 100mm Length Blue Nylon Cable Ties Wire Cord Strap
100 Pcs 3mm Width 100mm Length Blue Nylon Cable Ties Wire Cord Strap
$4.30
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
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
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
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
$9.99
10PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
10PC 18 Heavy Duty Bungee Cords 18 inch Long Bungee Thick Tie Downs w Hooks
$99.99
100 Pcs 3mm Width 200mm Length Green Nylon Cable Ties Wire Cord Strap
100 Pcs 3mm Width 200mm Length Green Nylon Cable Ties Wire Cord Strap
$4.79
6 PC 48 HEAVY DUTY BUNGEE CORD ORANGE HOOK TIE DOWN STRAP 6 PC SET
6 PC 48 HEAVY DUTY BUNGEE CORD ORANGE HOOK TIE DOWN STRAP 6 PC SET
$12.49
6pcs 72 AND 6pcs 48 LONG HEAVY DUTY BUNGEE CORD TIE DOWN CORDS SUPER THICK
6pcs 72 AND 6pcs 48 LONG HEAVY DUTY BUNGEE CORD TIE DOWN CORDS SUPER THICK
$22.79
Household Handy Beige Tidy Cables Cord Wire Ties 8mmx200mm 100 Pieces
Household Handy Beige Tidy Cables Cord Wire Ties 8mmx200mm 100 Pieces
$12.73
6pk Extra Strong Color Coded Bungee Cord Coated Steel Hooks Wide Straps Tie Down
6pk Extra Strong Color Coded Bungee Cord Coated Steel Hooks Wide Straps Tie Down
$15.97
Asus Universal Velcro Cable Tie power supply cord wires cables
Asus Universal Velcro Cable Tie power supply cord wires cables
$1.00
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
$9.99
6 Pack Multicolored 12 18 24 Tie Down Bungee Stretch Cords with
6 Pack Multicolored 12 18 24 Tie Down Bungee Stretch Cords with
$7.99
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
$18.99
12 24 HEAVY DUTY BLACK HOOK BUNGEE CORD TIE DOWN STRAP 12 PC SET
12 24 HEAVY DUTY BLACK HOOK BUNGEE CORD TIE DOWN STRAP 12 PC SET
$14.99
100pcs 25100mm Label tie Network Cable Cord Wire Strap Zip Nylon
100pcs 25100mm Label tie Network Cable Cord Wire Strap Zip Nylon
$0.45
8 3x200mm Locking black white Nylon Plastic 100 xCable Ties Zip Wire cord Wrap
8 3x200mm Locking black white Nylon Plastic 100 xCable Ties Zip Wire cord Wrap
$2.69
Rolson 1800Mm Flat Bungee 20 X 5Mm Travel Cord Holder Tie Elastic Secure 44147
Rolson 1800Mm Flat Bungee 20 X 5Mm Travel Cord Holder Tie Elastic Secure 44147
$14.79
500 Pack PCS 8 inch Network Cable Cord Wire BLACK Tie Strap 40 Lbs Zip Nylon
500 Pack PCS 8 inch Network Cable Cord Wire BLACK Tie Strap 40 Lbs Zip Nylon
$11.92
CHUMS 1211504LS Eyewear Retainer Cord Tie Dye Mix PK25
CHUMS 1211504LS Eyewear Retainer Cord Tie Dye Mix PK25
$76.25
120 PCS Pack39 inch 60 Lbs white Network Cable Cord Wire Tie Strap Zip Nylon
120 PCS Pack39 inch 60 Lbs white Network Cable Cord Wire Tie Strap Zip Nylon
$0.99
100 PCS Pack 78 inch 60 Lbs white Network Cable Cord Wire Tie Strap Zip Nylon
100 PCS Pack 78 inch 60 Lbs white Network Cable Cord Wire Tie Strap Zip Nylon
$1.59
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 36 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 36 long
$8.99
50 Self locking Green Colored Nylon Wire Cord Cable Zip Ties Straps Organizers
50 Self locking Green Colored Nylon Wire Cord Cable Zip Ties Straps Organizers
$2.29
Heavy Duty Bungee Cord 1 2 x 42 Tie Down
Heavy Duty Bungee Cord 1 2 x 42 Tie Down
$1.79
Heavy Duty Bungee Cord 1 2 x 48 Tie Down
Heavy Duty Bungee Cord 1 2 x 48 Tie Down
$1.85
10PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
10PC 64 Heavy Duty Bungee Cords 64 inch Thick Tie Downs w Hooks CAL HAWK BRAND
$49.99
2pcs Heavy Duty 18 Bungee Cord Elastic Tie Down Stretch Bungie Strap Metal Hook
2pcs Heavy Duty 18 Bungee Cord Elastic Tie Down Stretch Bungie Strap Metal Hook
$2.25
10PC 24 Heavy Duty Bungee Cords 24 inch Thick Tie Downs w Hooks CAL HAWK BRAND
10PC 24 Heavy Duty Bungee Cords 24 inch Thick Tie Downs w Hooks CAL HAWK BRAND
$22.99
24 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
24 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
$30.39
Heavy Duty Bungee Cord 1 2 x 24 Tie Down Strap
Heavy Duty Bungee Cord 1 2 x 24 Tie Down Strap
$1.19
10 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
10 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$32.50
50pcs 8 200x3mm Strong Self Locking Nylon Plastic Wire Cable Zip Ties Cord Wrap
50pcs 8 200x3mm Strong Self Locking Nylon Plastic Wire Cable Zip Ties Cord Wrap
$2.94


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