# physics

A surprising demonstration involves dropping egg from a third-floor window so that the egg lands on a foam-rubber pad without breaking. If a 56-g egg falls (from rest) 12m, and the 5cm thick foam pad stops it in 6.25ms, by how much is the pad compressed? (NOte: assume constant upward acceleration as the egg compresses the foam-rubber pad)

1. 👍 0
2. 👎 0
3. 👁 1,343
1. Calculate the speed V = sqrt (2gH) of the egg when it hits the pad. I get 15.3 m/s. Multiply that by the mass M to get the momentum, MV = 0.856 kg m/s. The average upward force on the egg, Fav, multiplied by the time to bring it to a stop (6.25*10^-3 s) equals the momentum. Therefore Fav = 137 Newtons.
The compression equals the average velocity during deceleration, 7.65 m/s multiplied by the time of contact,6.25*10^-3 s. I get 4.8 cm, just a bit less than the thickness of the pad. A thinner pad would not have worked.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Science

Egg-laying land animals have evolved to produce eggs with tough shells to ensure that 1 external fertilization can take place. 2 the egg and sperm can fuse 3 parental care is unnecessary*** 4 the developing embryo does no dry out

2. ### Physics

You are on the roof of the physics building, 46 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professorâ€™s

3. ### Science HELP

Placental mammals develop _______ A) In an egg laid in water B) A pouch of their mother's body C) Inside the mother's body**** D) Inside an amniotic egg

4. ### English

Use the introductory paragraph to answer the question. Did you know that if a car is hit with an entire carton of eggs, the cost of repainting it could be as much as \$15,000? Egging cars is a popular, age-old prank, but it should

1. ### Science Help! Just 2 Questions! Really Quick!

Placental mammals develop _______ A) In an egg laid in water B) A pouch of their mother's body C) Inside the mother's body D) Inside an amniotic egg Angiosperms reproduce with _______ A) Spores B) Seeds C) Cones D) Amniotic egg My

2. ### Math

Azeem bought 30 dozen eggs. Out of which 30 eggs were rotten. If he bought it for Rs 1800. What should be the selling price of each egg to get a profit of one rupe per egg. Please explain it I can't get it

3. ### Science - Please Look!

The senses are used to make which of the following? inferences predictions evaluations ((**observations**)) You walk into the kitchen and see a broken egg on the floor. Which of the following is an inference you can make based on

4. ### math

mark makes easter eggs.each egg contains 6 toffees,the toffees being selected from 3 different sorts.how many different selections are possible if each egg must contain at least one toffee of each sort?

1. ### Math

Kendra owns a restaurant. She charges \$3.00 for two eggs and one piece of toast and \$1.80 for one egg and one piece of toast. How much does Kendra charge per egg? How much per piece of toast? a. \$1.20 per egg; \$0.60 for toast***

2. ### Science

You walk into the kitchen and see a broken egg on the floor. Which of the following is an inference you can make based on this observation? a) The egg rolled off the kitchen counter b) the dog will eat the egg off the floor c)

3. ### math

TWO EGGS ARE SIMILAR IN SHAPE WITH MASS 50 G AND 70G THE HEIGHT OF BIGGER EGG IS 8 CM FIND THE HEIGHT OF SMALLER EGG SCALE FACTOR K=0.238

4. ### science

Egg-laying land animals have evolved to produce eggs with tough shells to ensure that A .external fertilization can take place. B.the egg and sperm can fuse C.parental care is unnecessary*** D. the developing embryo does no dry