1-1. Assume that a 50-kg runner trips and falls on his extended hand. If the bones of one arm absorb all the kinetic energy (fE) (neglecting the energy of the fall), what is the minimum speed of the runner that will cause a fracture of the arm bone? Assume that the length of arm is 1 m and that the area of the bone is 4 cm?. 1-2. Repeat the calculations in Exercise 1-1 using impulsive force considerations. Assume that the duration of impact is 10-2 sec and the area of impact is 4 cm?. Repeat the calculation with area of impact=1 cm². 1-3. From what height can a 1-kg falling object cause fracture of the skull (K** )? Assume that the object is hard, that the area of contact with the skull is 1 cm², and that the duration of impact is 10-3 sec.

Question
1-1. Assume that a 50-kg runner trips and falls on his extended hand. If the bones of one
arm absorb all the kinetic energy (fE) (neglecting the energy of the fall), what is
the minimum speed of the runner that will cause a fracture of the arm bone? Assume
that the length of arm is 1 m and that the area of the bone is 4 cm?.
1-2. Repeat the calculations in Exercise 1-1 using impulsive force considerations. Assume
that the duration of impact is 10-2 sec and the area of impact is 4 cm?. Repeat the
calculation with area of impact=1 cm².
1-3. From what height can a 1-kg falling object cause fracture of the skull (K** )?
Assume that the object is hard, that the area of contact with the skull is 1 cm², and
that the duration of impact is 10-3 sec.
View transcribed image text
Expand

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Advanced Physics

Other

Related Advanced Physics Q&A

Find answers to questions asked by students like you.

Q: 14. A car travels at a constant velocity of 30 m/s. How far does it travel in 60 seconds?

A: Velocity = 30 m/s  Time = 60 seconds 

Q: It's a quantum mechanics question.

A:   Given, f,g=∑i∂xif ∂pig-∂pif ∂xig       ..........1 Anticommutativity: Now by definition, g,f=∑i∂xi...

Q: Which mediums did the waves in the exploration travel through

A: Given information: It is mentioned in the exploration that the wave are classified as mechanical and...

Q: The translation operator for a finite spatial displacement is given in several dimensions by T(l)...

A: Solution: Given Operator: T^(l)=exp-2πiplh      

Q: You’re windsurfing at 6.28 m/s when a gust hits, accelerating your sailboardat 0.714 m/s2at 48.8◦to ...

A: Displacement of an object moving with constant acceleration at time t is given by    ..................

Q: Calculate the maximum acceleration of a car that is heading up a 4 degree slope (one tha

A: Using Newton's second law, net work on the car is given by                                          ...

Q: A dipole of moment p1 lies at the origin and a dipole of p2 lies at a point whose position vector is...

A: Two dipole are to be arranged in such a way that their forces etween them maximum .              Ele...

Q: If two stars differ by 5 magnitudes, how many times greater is the flux from one star than the other...

A: The relationship between magnitudes and fluxes from two stars is given by, f1f2 = 100m1 - m2/5 where...

Q: 21. A car starts at a green light and accelerates at 6 m/s2. A truck passes through the same light a...

A: The kinematic equation of motion is given by Where u = Initial speed, a = acceleration, t = time, S...

Q: The end of two parallel semi-infinite-length wires is connected to a semicircular loop with a radius...

A: Let us consider that, we are to find the magnetic field along the z-axis at a distance z from the or...

Q: Choose the correct answer

A: Introduction: Bohr, in an attempt to understand the structure of an atom better, combined classical ...

Q: Understanding the details of timing and forces in motion can improve the performance of athletes, in...

A: Given: Weight of the dancer = 42 kg  

Q: Name all the strong forces exist in our environment.

A: There are four forces.  Gravitational Force  Weak Nuclear Force Electromagnetic Force  Strong Nucle...

Q: What are the expected readings of the following in the figure below? (R = 5.60 ohms, DeltaV = 5.00 V...

A: Click to see the answer

Q: A car is 200. m from a stop sign and traveling toward the sign at 40.0 m/s. If the driver realizes t...

A: The distance moved by the car while the driver applies the brake is d=utd=40.0 m/s0.200 sd=8 m      ...

Q: A potted plant that weighs 20 lb is being suspended by a three-member structure as shown. Determine ...

A: Given : W=20lb or W→=(-20k^)lb Direction of weight is along negative z axis. At equilibrium,  ∑F→net...

Q: An object is moving at a steady slow down until it stops. Cover in the fourth second before the last...

A: Distance travelled by nth  second is given by : Sn=u+12a2n-1      .........1 where,  u is the initia...

Q: (III) Rank the following five-card hands in order ofincreasing probability: (a) four aces and a king...

A: Let us analyse each of the given systems and their probability. The macrostate in the given situatio...

Q: 4. Explain a diffraction grating.

A: Diffraction grating is an optical tool used to separate light into its component wavelength using th...

Q: Consider a particle in the infinite potential well at -a <I < a. The particle is in a superposition ...

A: The given wave function and its complex conjugate be defined as, ψx=12ae-iE1tħcosπx2a+e-iE2tħsinπxaψ...

Q: A block having a mass m is pressed against a wall by a hand exerting a force F inclined at an angle ...

A: Answer:   a) It is asked to solve the smallest value of force that will keep the block from sliding ...

Q: A horizontal force, F of 30 N is applied to a 2 kg object as it slides a distance d of 1.7 m up a fr...

A: Click to see the answer

Q: Please show work

A: Given, rest mass of muonmμ=1.06×108 eV/c2and total energy isE=2.5×109 eV

Q: Two semi-infinite grounded conducting planes meet at right angles. In the region between them, there...

A: (a) Given: Two semi-infinite grounded planes meet at right angles. In the region between them, point...

Q: A starship blasts past the earth at 2.0 x 108 m/s. Just after passing the earth, the starship fires ...

A: Click to see the answer

Q: how does the acceleration of gravity g values that you found (-8.4476 and -8.152) compare with each ...

A: Click to see the answer

Q: I kg is initially A wedge of mass driven up a frictionless ramp by a horizontal force F = 50 N due t...

A: Since you have posted question with multiple sub-parts. We will solve first three sub-parts for you....

Q: How many neutrons per second are emitted spontaneously from a 1 mgsample of 252Cf? For 252Cf assume ...

A: Given: T12=2.745y=2.745*365*24*60*60sec T12=86,566,320sec The number of neutrons created per spontan...

Q: A 5.00 µ point charge is held in place at the orgin of a coordinate system. Another point of charge ...

A: Given: A 5 μC point charge is held at the origin. A 8 μC point charge is at the coordinates (0.5,0.3...

Q: The absorption spectrum of an atom consists of the wavelengths 200 nm, 300 nm, and 500 nm.a. Draw th...

A: Given values, Wavelengths in absorption spectrum, λ1=200 nmλ2=300 nmλ3=500 nm

Q: A five pound-video camera has been lowered one hundred feet into a deep pit on a chain which weighs ...

A: Given: Mass of the camera,           m=5 pound×0.453592 kg1 poundm=2.267 kg Length of the chain, ...

Q: Assume that a 10-km asteroid hits the earth at about 20 km/s   An amount of water equal to about 30 ...

A: Given: The velocity of the asteroid hitting the earth: v = 20 km/s = 20000 m/s   [1 km = 1000 m] Let...

Q: A vector field F(7) satisfies V × F(7) = 0. Is this a necessary & sufficient condition for the vecto...

A: Curl of the vector field is, ∇→×F→=∂Fz∂y-∂Fy∂zi^+∂Fx∂z-∂Fz∂xj^+∂Fy∂x-∂Fx∂yk^

Q: A particle is moving upward to the right along the path ? = ?2 + 26 where x and y are in meters. The...

A: x-component of velocity is given by y-component of velocity is given by Velocity is given by x-co...

Q: In a certain region, the electric field intensity is given by: E = (2 cos / r) a.-(r sin D) aq + (4 ...

A: The given electric field is in the cylindrical coordinate system. E=2cosΦrar-rsinΦaΦ+4z2cosΦaz  V/m ...

Q: Calculate the mean (expectation) values of the coordinate and momentum for a particle in a ld infini...

A: Click to see the answer

Q: Use the data provided for Dorainn to determine the mass of Eagal.

A: Just take the information provided from the Dorainn moon,   the time period is represented as, T=2πr...

Q: Integrated Concepts An elevator filled with passengers has a mass of 1700 kg. (a) The elevator accel...

A: Given: An elevator filled with passengers has a mass of 1700 kg.

Q: 1- Tension force of BC (TBC) is dependent on tension force of AB (TAB) by  ?  2- The tension force o...

A: Given: Dimensions as given in figure.

Q: How can I get the solutions and answer to this problem?  The mass of a given airplane at sea level i...

A: 1 ton = 1000 kg 1 feet = 0.3048 meter The weight of the object is given by W = Mg Where M = Mass of ...

Q: A woman bails out of an airplane at an altitude of 11,000 ft, falls freely for 15 s, then opens her ...

A: Given, Altitute =11000 ft and air resistance is ρv

Q: Supply all missing information with the correct numerical values. Do not include the units. Round of...

A: Analyze the free body diagram given below,  

Q: A block of mass m, = 14.4 kg is on a frictionless table to the left of a second block of mass m, = 1...

A: (a) According to Newton’s second law, F=m1+m2a Rearrange the above equation for a, a=Fm1+m2 Use the ...

Q: Use the talble to detemine the energy in evof the photon emitted when thee bectran. Jumps down from ...

A: The energy of photon emitted when the an electron make transition from an initial state specified by...

Q: In Albert Einstein’s special theory of relativity, time slows down and length in the direction of mo...

A: Click to see the answer

Q: State and explain whether the activity of a given number of atoms of plutonium is affected when they...

A: The radioactive decay is a nuclear process, and chemical bonding is an atomic process. It means, the...

Q: The uniform slender rod of mass m is suspended bya ball-and-socket joint at O and two cables. Determ...

A: Given: OB→=1.2m Therefore Om=0.6m OA→=0.9m Free body diagram:      

Q: 1. An m = 1.5 kg block is pulled across a horizontal surface with a constant force of F = 3.8 N appl...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for y...

Q: The tension T (measured in Newtons) in the string of a yo-yo is shown in the figure below, where m i...

A: Change in tension is, dT=∂T∂rdr+∂T∂RdR=∂∂rmgR2r2+R2dr+∂∂RmgR2r2+R2dR=-4mgrR2r2+R22dr+mg2r2-R22r2+R22...

Q: On a floor, there are several 1-4 mm elongated drops leading away from a body lying in a pool of blo...

A: Observation 1:There are several 1-4mm elongated drops leading away from the body Conclusion: the per...

Transcribed Image Text

1-1. Assume that a 50-kg runner trips and falls on his extended hand. If the bones of one arm absorb all the kinetic energy (fE) (neglecting the energy of the fall), what is the minimum speed of the runner that will cause a fracture of the arm bone? Assume that the length of arm is 1 m and that the area of the bone is 4 cm?. 1-2. Repeat the calculations in Exercise 1-1 using impulsive force considerations. Assume that the duration of impact is 10-2 sec and the area of impact is 4 cm?. Repeat the calculation with area of impact=1 cm². 1-3. From what height can a 1-kg falling object cause fracture of the skull (K** )? Assume that the object is hard, that the area of contact with the skull is 1 cm², and that the duration of impact is 10-3 sec.