QUESTION 3 Why does an egg break if it is dropped from 1 meter onto hardened concrete but does not break if it is dropped from 1 me onto a soft mattress? O The mattress increases the inertia of the egg and makes it more resistant to change so it doesn't break. O The mattress' cushioning increases the contact time with the egg and decreases the force acting on the egg. O The mattress' cushioning decreases the contact time with the egg and decreases the force acting on the egg. O None of these

QUESTION 3 Why does an egg break if it is dropped from 1 meter onto hardened concrete but does not break if it is dropped from 1 me onto a soft mattress? O The mattress increases the inertia of the egg and makes it more resistant to change so it doesn't break. O The mattress' cushioning increases the contact time with the egg and decreases the force acting on the egg. O The mattress' cushioning decreases the contact time with the egg and decreases the force acting on the egg. O None of these

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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-20° Problem 50. The 5-oz pinewood-derby car is released from rest at the starting line A and crosses the finish line C 2.75 sec later. The transition at B is small and smooth. Assume that the net retarding force is constant throughout the run and find this force. B 10' 15'
Given that the force per unit area that may cause a bone fracture is 109 dyne/cm2,the minimum height from which a 70-kg man would jump and consequently has a fracture if he falls flat on his heels (the area of impact is 2 cm² and the impact time is 0.01 s) is: O a. 4.16 m O b. 4.16 cm O C. 41.6 cm O d. 41.6 m
What does it mean for an object to be more elastic? O if the object offers more resistance to the deforming force and returns back to its original shape quickly after the force is removed O if the object offers less resistance to the deforming force and returns back to its original shape after the force is removed O if the object offers less resistance to the deforming force and returns back to its original shape slowly after the force is removed
n expeximent of bellt of og kg (s let it to 20 do un on romb from rest fom hiezht of 98m above table. At bottom of Yanb it fine bull-a of d4k3 Siting at alze of Tbe Atlep clhint wold be sbeed with which ball-2 blae)a Ashoun. hits 2ond in mlb ( one decimal 十

Dwayne ‘The Rock’ Johnson needs to escape from the fourth floor of a burning building (in a movie). He ties a rope around his waist and ties the other end to a 63 kg desk. Then he climbs out of a window and begins to lower himself down. The rope becomes taught when he lets go of the window sill. Then the desk begins to slide on the floor and he starts to accelerate downwards (starting from rest). Dwayne has a mass of 118 kg. The smooth window sill acts as a frictionless pulley. The desk is 10 m from the window. The kinetic friction of the desk sliding on the flooris 370 N. How fast is he travelling when th desk reaches the window?(Hint: Unbeknownst to the audience, The Rock aced Physics 1200 and knows that the tension in the rope is not 370 N)
1.A weight lifter lifts a 350-N set of weights from ground level to a position over his head, a vertical distance of 2.00m. How much does the weights lifter do, assuming he moves the weights at constant speed? with free body diagram.
For the cases shown in the image, the object is released from rest at the top and feels no friction or air resistance. In which case (if there is any) will the mass have the highest speed at the bottom?
Question 2 Figure 2 shows a 2-story steel frame with h = 4 m and b = 6 m, determine the equivalent horizontal forces (EHF) for both floors under the following actions: Dead load = 20 kN/m Imposed load = 12 kN/m Students can make their own rational assumptions for any information which they think is required but not provided. Clear state the assumptions and the corresponding justifications. W W b Figure 2 h
4. A ½ kg mass is pushed at 6 m/s from position A below. It slides down a frictionless surface past position B. At position C it encounters a surface which has a coefficient of friction of 0.4. Location D is 30 meters past location C. From location D and on the surface is again frictionless. The height of the first downhill section is 22 meters. a. Determine the velocity of the mass at location B. b. Determine the velocity of the block at location D. c. Determine the velocity of the block at location E 10 meters past D. Z zm イニ0
time = 0 time = t -10 kinetic friction A block slides on a horizontal plane. The initial speed is vo = 2.5 m/s. - V The block slows down because of friction; the coefficient of kinetic friction is 0.100. At time t the speed is vo/2. What is t? (in s) OA: 1.089 OB: 1.274 OC: 1.491 OD: 1.744 OE: 2.041 OF: 2.388 OG: 2.794 OH: 3.269
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