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:

30 x Plastic 790mm 311 Wire Cord Cable Ties Off White
30 x Plastic 790mm 311 Wire Cord Cable Ties Off White
$21.21
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
$0.99
12 PK Heavy Duty 48 4 Long x 7 16 Dia Thick Bungee Cords Tie Down Cord Strap
12 PK Heavy Duty 48 4 Long x 7 16 Dia Thick Bungee Cords Tie Down Cord Strap
$22.99
10x 13 Black Velcro Fastener Cable Tie Down Straps Reusable Cord Hook
10x 13 Black Velcro Fastener Cable Tie Down Straps Reusable Cord Hook
$7.49
175 Pcs 5mmx400mm Plastic Power Cable Wire Cord Zip Ties Straps Beige
175 Pcs 5mmx400mm Plastic Power Cable Wire Cord Zip Ties Straps Beige
$13.94
100 PCS Pack 12 inch 60 Lbs Black Network Cable Cord Wire Tie Strap Zip Nylon
100 PCS Pack 12 inch 60 Lbs Black Network Cable Cord Wire Tie Strap Zip Nylon
$5.46
New 100pcs Black 8 3x200mm Locking Nylon Plastic Cable Wire Zip Ties Cord Wrap
New 100pcs Black 8 3x200mm Locking Nylon Plastic Cable Wire Zip Ties Cord Wrap
$2.68
60 Nylon CABLE TIES White 7 1 2 x 3 16 60 lb Test zip Locking cord Wraps 75
60 Nylon CABLE TIES White 7 1 2 x 3 16 60 lb Test zip Locking cord Wraps 75
$5.94
30 Nylon CABLE TIES 11 inch Long x 1 8 Wide WHITE 40 lb cord wire lock ZIP TIE
30 Nylon CABLE TIES 11 inch Long x 1 8 Wide WHITE 40 lb cord wire lock ZIP TIE
$6.83
100 x Plastic 290mm 114 Wire Cord Cable Ties Off White
100 x Plastic 290mm 114 Wire Cord Cable Ties Off White
$10.22
48 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
48 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$66.50
36 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
36 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$49.31
24 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
24 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$36.16
12 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
12 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$23.46
10 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
10 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$21.30
8 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
8 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$19.20
6 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
6 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$16.64
4 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
4 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$14.51
2 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
2 Bungee Shock Cords 42 Long Steel Hooks Truck Trailer Tarp Bungy Tie Downs
$10.17
150 x Plastic 154 390mm Wire Cord Cable Ties Off White
150 x Plastic 154 390mm Wire Cord Cable Ties Off White
$22.87
Coghlans 512 Strong Utility Bungee Cords Stretch Straps Tie Downs 20 2 pack
Coghlans 512 Strong Utility Bungee Cords Stretch Straps Tie Downs 20 2 pack
$5.99
Coghlans 513 Bungee Cord Stretch Strap Tie Down 33 Multi Strand Rubber Core
Coghlans 513 Bungee Cord Stretch Strap Tie Down 33 Multi Strand Rubber Core
$5.75
Coghlans 514 Bungee Cord Stretch Strap Tie Down 40 Multi Strand Rubber Core
Coghlans 514 Bungee Cord Stretch Strap Tie Down 40 Multi Strand Rubber Core
$3.99
Coghlans 515 Bungee Cord Stretch Strap Tie Down 50 Multi Strand Rubber Core
Coghlans 515 Bungee Cord Stretch Strap Tie Down 50 Multi Strand Rubber Core
$6.25
Coghlans 516 Bungee Cord Stretch Strap Tie Down Secure Gear Packs Camping Hike
Coghlans 516 Bungee Cord Stretch Strap Tie Down Secure Gear Packs Camping Hike
$4.95
20 x Plastic 790mm 311 Wire Cord Cable Ties Off White
20 x Plastic 790mm 311 Wire Cord Cable Ties Off White
$15.33
100 x Plastic 390mm 154 Wire Cord Cable Tie Off White
100 x Plastic 390mm 154 Wire Cord Cable Tie Off White
$18.00
Hook  Loop Fastening Ties 6 inch 50 Pack WHITE Tie Down Cord Cable Reusable
Hook Loop Fastening Ties 6 inch 50 Pack WHITE Tie Down Cord Cable Reusable
$10.88
Hook  Loop Fastening Ties 6 inch 50 Pack WHITE Tie Down Cord Cable Reusable
Hook Loop Fastening Ties 6 inch 50 Pack WHITE Tie Down Cord Cable Reusable
$10.34
100 PCS Pack 6 inch Black Network Cable Cord Wire Tie Strap 30 Lbs Zip Nylon in
100 PCS Pack 6 inch Black Network Cable Cord Wire Tie Strap 30 Lbs Zip Nylon in
$2.94
NEW 100 8 in inch ZIP TIE BLACK CABLE WIRE ZIPTIE PLASTIC CORD ORGANIZER WRAP
NEW 100 8 in inch ZIP TIE BLACK CABLE WIRE ZIPTIE PLASTIC CORD ORGANIZER WRAP
$4.75
100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap 12 5x300mm
100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap 12 5x300mm
$5.60
LOT 100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap 8 3x200mm
LOT 100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap 8 3x200mm
$2.79
8 3x200mm LOT 100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap
8 3x200mm LOT 100PCS Locking BLACK Nylon Plastic Cable Ties Zip Wire cord Wrap
$2.68
New 12 pc BUNGEE CORD TIE DOWN CORDS 24 LONG  US SHIPPER
New 12 pc BUNGEE CORD TIE DOWN CORDS 24 LONG US SHIPPER
$12.95
150 x Plastic 290mm 114 Wire Cord Cable Ties Off White
150 x Plastic 290mm 114 Wire Cord Cable Ties Off White
$12.91
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
12 HEAVY DUTY BUNGEE CORD TIE DOWN CORDS 72 long
$9.99
100 New 6 Inch Color Nylon Cable Cord Wire Zip Ties Strap 30 Lbs Uv Resistant
100 New 6 Inch Color Nylon Cable Cord Wire Zip Ties Strap 30 Lbs Uv Resistant
$3.99
1 Black HEAVY DUTY BUNGEE CORD Tie Down Stretch Strap Cord 24 61cm x 13 32
1 Black HEAVY DUTY BUNGEE CORD Tie Down Stretch Strap Cord 24 61cm x 13 32
$2.99


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