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:

10 PK Heavy Duty 48 4 Long x 1 2 Dia Thick Bungee Cords Tie Down Cord Strap
10 PK Heavy Duty 48 4 Long x 1 2 Dia Thick Bungee Cords Tie Down Cord Strap
$21.99
6 Pack Multicolored 12 18 24 Tie Down Bungee Stretch Cords with Hook Ends
6 Pack Multicolored 12 18 24 Tie Down Bungee Stretch Cords with Hook Ends
$7.59
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
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
10Pc 21 Premium Heavy Duty EPDM Rubber Blend Bungee Tie Down Strap Cord Lot
10Pc 21 Premium Heavy Duty EPDM Rubber Blend Bungee Tie Down Strap Cord Lot
$22.99
24 G INDUSTRIAL TOOL 24 2ft SHOCK BUNGEE CORDS HEAVY DUTY TIE DOWN STRAPS
24 G INDUSTRIAL TOOL 24 2ft SHOCK BUNGEE CORDS HEAVY DUTY TIE DOWN STRAPS
$17.99
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
50 Pcs 150mm x 3mm Electrical Cord Cable Tie Fastener Off White
50 Pcs 150mm x 3mm Electrical Cord Cable Tie Fastener Off White
$3.60
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
$22.90
24 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
24 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 48 long
$31.99
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
Bungee Cord Assortment Jar 24 PC Asorted Color Length Elastic Canopy Ties Hooks
Bungee Cord Assortment Jar 24 PC Asorted Color Length Elastic Canopy Ties Hooks
$25.87
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
10PC 18 Heavy Duty Bungee Cords 18 inch CAL HAWK BRAND Thick Tie Downs w Hooks
10PC 18 Heavy Duty Bungee Cords 18 inch CAL HAWK BRAND Thick Tie Downs w Hooks
$19.75
Lot of 50 15 EPDM Rubber Tie Down Cord Hooks Bungee Strap Rope Elastic
Lot of 50 15 EPDM Rubber Tie Down Cord Hooks Bungee Strap Rope Elastic
$46.99
Lot of 50 21 EPDM Rubber Tie Down Cord Hooks Bungee Strap Rope Elastic
Lot of 50 21 EPDM Rubber Tie Down Cord Hooks Bungee Strap Rope Elastic
$46.99
10 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
10 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$21.50
MASTERLOCK 24 PACK BUNGEE CORD TIE DOWN ST3023AT
MASTERLOCK 24 PACK BUNGEE CORD TIE DOWN ST3023AT
$20.29
50 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
50 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$75.00
50 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
50 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$48.00
20 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
20 Pack 31 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$45.00
20 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
20 Pack 15 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$38.00
20 Pack 41 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
20 Pack 41 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$48.00
10 Pack 41 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
10 Pack 41 EPDM Rubber Tie Down Cord Chrome Hooks Bungee Strap Rope Elastic
$35.00
10Pc 15 Premium Heavy Duty EPDM Rubber Blend Bungee Tie Down Strap Cord Lot
10Pc 15 Premium Heavy Duty EPDM Rubber Blend Bungee Tie Down Strap Cord Lot
$19.99
100 PACK HEAVY DUTY Nylon Cable Zip Tie 11 inch 46LBS Black Wire Cord Electrical
100 PACK HEAVY DUTY Nylon Cable Zip Tie 11 inch 46LBS Black Wire Cord Electrical
$5.59
100PCS 12 5x300mm Locking Nylon Plastic Cable Ties Zip Wire BLACK cord Wrap
100PCS 12 5x300mm Locking Nylon Plastic Cable Ties Zip Wire BLACK cord Wrap
$5.21
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
$9.99
3 piece 20 Rubber Tie Down Heavy Duty Motorcycle Car Truck Bungee Straps Cords
3 piece 20 Rubber Tie Down Heavy Duty Motorcycle Car Truck Bungee Straps Cords
$15.28
7mm x 210mm Yellow Self locking Plastic Cable Cord Tie Fastener 5pcs
7mm x 210mm Yellow Self locking Plastic Cable Cord Tie Fastener 5pcs
$3.27
100 pcs 1 pack 4 inch Black Nylon Cable Wire Zip Ties Cord 100mm x 3 mm
100 pcs 1 pack 4 inch Black Nylon Cable Wire Zip Ties Cord 100mm x 3 mm
$2.19
100 Pcs 3mm x 200mm Red Self Locking Cable Ties Wire Cord Strap
100 Pcs 3mm x 200mm Red Self Locking Cable Ties Wire Cord Strap
$4.76
Black Pack 12 inch 60 Lbs Network Cable Cord Wire Tie Strap Zip Nylon 100 PCS
Black Pack 12 inch 60 Lbs Network Cable Cord Wire Tie Strap Zip Nylon 100 PCS
$2.04


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