Very large forces are produced in joints when a person jumps from some height to the ground. (a) Calculate the magnitude of the force produced if an 80.0-kg person jumps from a 0.600–m-high ledge and lands stiffly, compressing joint material 1.50 cm as a result. (Be certain to include the weight of the person.) (b) In practice the knees bend almost involuntarily to help extend the distance over which you stop. Calculate the magnitude of the force produced if the stopping distance is 0.300 m. (c) Compare both forces with the weight of the person.

Question

Very large forces are produced in joints when a person jumps from some height to the ground. (a) Calculate the magnitude of the force produced if an 80.0-kg person jumps from a 0.600–m-high ledge and lands stiffly, compressing joint material 1.50 cm as a result. (Be certain to include the weight of the person.) (b) In practice the knees bend almost involuntarily to help extend the distance over which you stop. Calculate the magnitude of the force produced if the stopping distance is 0.300 m. (c) Compare both forces with the weight of the person.

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
Physics

Newtons Laws of Motion

Related Physics Q&A

Find answers to questions asked by students like you.

Q: Physics Question

A: When a receiver is moving farther away from source emitting sound then the frequency of the sound wa...

Q: A copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. Th...

A: Given: T1 = 100 degree C  T2 = 0 degree C  T = 50 degree C  length of copper rod, Lc = 0.15 m  therm...

Q: Is it possible for speed to be constant while acceleration is not zero? Give an example of such a si...

A: Given:  speed and acceleartion

Q: Can carbon-14 dating be used to measure the age of a rock? Explain.

A: Carbon dating is a method which is used to find age of objects younger than 50,000 years.  

Q: Only two forces act on an object (mass = 4.45 kg), as in the drawing. Find the (a) magnitude and (b)...

A: Click to see the answer

Q: Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands...

A: The expression for the resistance of the wire,

Q: Electric fish generate current with biological cells calledelectroplaques, which are physiological e...

A: Given that, Number of electro plaques = 5000 Number of rows = 140 emf = 0.15V R = 800 ohm r = 0.25 o...

Q: You have two 1500 kg masses 80.0 m apart. What is the gravitational potential energy of this system?...

A: Click to see the answer

Q: A 10 cm wire carrying a current of 20 A is placed in a uniform magnetic field of 0.3 T. ifthe wire m...

A: Given:  length,l = 10 cm = 0.1 m  current,i = 20 A  magnetic field ,B = 0.3 T  Angle between field a...

Q: Consider two closely spaced and oppositely charged parallel metal plates. The plates are square with...

A: The expression for the electric field is,  

Q: Suppose you have a sample of radioactive material that decays with a time constant of 60 minutes. If...

A: Click to see the answer

Q: An object that is thrown straight up falls back to Earth. This is one-dimensional motion. (a) When i...

A: Given:  An object thrown upwards 

Q: What are primary components of sound source?

A: Click to see the answer

Q: How do the thermal conductivity of gases and liquids vary with temperature?

A: Given:  thermal conductivity 

Q: Using Kirchoff rules and calculate currents

A: Click to see the answer

Q: State the second condition that is necessary to achieve equilibrium.

A: There are two conditions for the equilibrium: First is an external force on the body is zero.

Q: A carnot engine is called an ideal engine. Why?

A: Given:  carnot engine 

Q: Distances in space are often quoted in units of light years, the distance light travels in one year....

A: given:  Light year 

Q: What is a cathode ray?

A: Given:  cathode ray 

Q: What would be the momentum of an object pushed to the speed of light?

A:  

Q: A force tends to cause an object to accelerate.The force and the resulting acceleration have ...

A: Click to see the answer

Q: Riders in an amusement park ride shaped like a Viking ship hung from a large pivot are rotated back ...

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

Q: (a) What is the unknown emfx in a potentiometer that balances when Rx is 10.0 Ω , and balances when ...

A: Click to see the answer

Q: Based upon the reradiating properties of absorptivity, reflectivity and transmissivity, how would yo...

A: Click to see the answer

Q: “Strontium-90 is a pure beta source.” How could a physicist test this statement?

A: As it is known that beta particle is having negative charge.

Q: Angioplasty is a technique in which arteries partiallyblocked with plaque are dilated to increase bl...

A: The volume flow rate is directly proportional to the fourth power of radius

Q: A climbing anchor consists of two strands of nylon webbing clipped to bolts in the rock. The webbing...

A: Click to see the answer

Q: What is the volume, in m3, of 10,000 kg of CO2 at 20∘C and 1.0 atm pressure?  To put this in perspec...

A: The volume is given by,

Q: A 40-g ice cube floats in 200 g of water in a 100-g copper cup; all are at a temperature of 0°C. A p...

A: Given, mass of ice  40-g mass of water 200g mass of copper 100g initial temperature 0°C. Final tempe...

Q: Need help with Exploration 3.3 thanks!

A:  

Q: (a) Is a bouncing ball an example of simple harmonic motion? (b) Is the daily movement of a student ...

A: Given: A bouncing ball

Q: Define pressure in terms of weight.

A: Pressure is usually defined as force per unit area. In terms of weight, it can be defined as force e...

Q: How does regeneration affect the efficiency of a Brayton cycle, and how does it accomplish it?

A: By adding heat to the system, the regeneration increases the cycle efficiency of a Brayton cycle.

Q: Using an ohmmeter, a student measures the resistance between various points on his body. He finds th...

A: An ohmmeter is a device used to measure resistance between two points in a circuit. The factors on w...

Q: Helium gas is throttled steadily from 400 kPa and 60C. Heat is lost from the helium in the amount of...

A: The exit temperature,

Q: The capacitor in  23.55(b) will filter high-frequency signals by shorting them to earth/ground. (a) ...

A: a) write the formula for the capacitive reactance is, Therefore,