An athlete holds a 7.5-kg shot put in his hand with his lower arm horizontal, as shown in the figure. His lower arm has a mass of 2.8 kg and its center of gravity (or center of mass) is 12 cm from the elbow-joint pivot. How much force must the extensor muscle (which is FM in the figure) in the upper arm exert on the lower arm?

An athlete holds a 7.5-kg shot put in his hand with his lower arm horizontal, as shown in the figure. His lower arm has a mass of 2.8 kg and its center of gravity (or center of mass) is 12 cm from the elbow-joint pivot. How much force must the extensor muscle (which is FM in the figure) in the upper arm exert on the lower arm?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Introduction And Vectors

Section: Chapter Questions

Problem 59P

See similar textbooks

Related questions

Q: - A uniform beam of 5.0 kg holds up two masses, as shown. Find the center of gravity of the system…

Q: A small 1000-kg SUV has a wheel base of 3.0 m. If 60% if its weight rests on the front wheels, how…

A: Given A small 1000-kg SUV has a wheelbase of 3.0 m. If 60% of its weight rests on the front wheels,…

Q: A uniform 150-q beam is 1 meter long. If the fulcrum is placed 20 cm from the left end of the beam,…

A: Given data: Weight of beam (Fbeam) = 150 g Distance of beam centre of gravity from fulcrum (rb) =…

Q: Find the x- and y -coordinates of the center of gravity for theboomerang in Figure P8.12a, modeling…

Q: Two toddlers Anne (12.0 kg) and Bob (15.0 kg) sat on both ends of a uniform 5.00-m see-saw supported…

A: Mass of Anne (m) = 12 kg Mass of Bob (m') = 15 kg Length of see saw (L) = 5 m distance of support…

Q: Compute the center of gravity of the barbell system shown. Assume that the weight of the 36-in…

Q: The cantilevered W530x 150 beam shown is subjected to a 8.3-kN force Fapplied by means of a welded…

Q: Problems 7.42 and 7.43 The driveway gate is hinged at its right end and can swing freely The gate is…

A: Given:gate weight, W = 215 lbloap, P = 18.5 lbConsider the free-body diagram given below:…

Q: Normally the center of gravity of a human is about an inch below the navel in the center of the…

A: Center of gravity of human is balance point where lower and upper body weight balanced. Normally it…

Q: the horizontal arm is composed of 3 parts. the upper arm weight is 17.5N and the distance from the…

Q: In terms of center of gravity, support base, and torque, why can you not stand with heels and back…

A: The vertical line through the center of gravity of the person’s body will be in front of the tip of…

Q: 9. A uniform 400 N boom is supported as shown in the figure below. Fixl the tension in the tie rope…

A: Given : Boom weight W=400 N

Q: A uniform 150-q beam is 1 meter Long. If the fulcrum is placed 20 cm from the left end of the beam,…

Q: Two toddlers Anne (12.0 kg) and Bob (15.0 kg) sat on both ends of a uniform 5.00-m see-saw supported…

Q: A 1 200-N uniform boom atϕ = 65° to the horizontal is supportedby a cable at an angle θ =25.0° to…

Q: In exercise physiology studies, it is sometimes important to determine the location of a person's…

A: Consider that there are three forces at the location of the center of gravity. The balancing forces…

Q: In exercise physiology studies, it is sometimes important to determine the location of a person's…

Q: A store's sign has a mass of 20 kg and is 3.0 m long. It is uniform, so its center of gravity is at…

A: Given : mass of sign, m = 20 kg Length of sign, L = 3 m

Q: A car manufacturer claims that you can drive its new vehicle across a hill with a 47° slope before…

Q: A 5.0-m-long ladder leans against a wall at a point 4.0 m above a cement floor as shown. The ladder…

A: As per guidelines we are suppose to do only one question from multiple questions please post the…

Q: Two toddlers Anne (12.0 kg) and Bob (15.0 kg) sat on both ends of a uniform 5.00-m see-saw supported…

A: Since you have asked multiple questions in a single request, we would be answering only the first…

Q: A man opens a 1.00-m wide door by pushing on it with a forceof 50.0 N directed perpendicular to its…

Q: Elements of the lower arm are shown in the figure. The weight of the forearm is Q = 55 N and its…

Q: Question 1 A 55.0 kg child sits 1.80 m to the left of center on a seesaw of length, L-7.00 m, and…

A: Given data: Mass of the first child m1 =1.80 m Length of the seesaw L=7.00m Mass of the sea saw…

Q: far from the woman's feet is her center of gravity?

Q: In exercise physiologystudies, it is sometimesimportant todetermine the location ofa person’s center…

A: Given information:Reading on the scale 1 (Fg1) = 380 NReading on the scale 2 (Fg2) = 320 NThe…

Q: A museum of modern art is displaying an irregular 426-N sculpture by hanging it from two thin…

Q: Find the x- and y-coordinates of the center of gravity of a 4.00-ft by 8.00-ft uniform sheet of…

Q: The centre of gravity of ai glit angled triangle OAB with right angle at O is: 44. (A] Gou fon) (B]…

A: Center of gravity of a right angled triangle is its centroid.

Q: . A square plate is acted on by the three forces shown. Is the plate in static equilibrium? VEF Yes.…

Q: Two children of mass 19 kg and 27 kg sit balanced on a seesaw with the pivot point located at the…

Q: A uniform 35.0-kg beam of length, 5 5.00 m is supported by a verticalrope located d 5 1.20 m fromits…

A: Part A:

Q: A rigid lean-to shelter of weight 87.5 N is supported by a horizontal rope, as shown in the figure…

Q: In exercise physiology studies, it is sometimes important to determine the location of a person's…

Q: A 500.-N uniform rectangular sign 4.00 mwide and 3.00 m high is suspended from ahorizontal,…

A: Given data:Weight of the rectangular sign = 500 NWeight of the rod = 100 NLength of the rod, = 6.00…

Q: A uniform, 20-kg, 8.0-m-long, wooden plank that is parallel to lev left end of the plank, and the…

A: The mass of the rod is m = 20 kg The length of the rod is L = 8 m one pivot is at the extreme…

Q: If a walking stick with a mass of 300 g can be balanced by placing a mass M of 150 g at a distance L…

A: We have givenMass of walking stick(m)=300 gBalanced Mass(M)=150 gDistance of balanced mass from…

Q: A 80-kg person raises his entire body weight on the ball of one foot as shown in the figure.…

Q: As a part of his daily workout routine, he lifts 10-kg dumbbells on each hand. His hands and…

A: Draw a free-body diagram of the hand.

Q: A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the…

A: The coordinate of center of mass of a multi body system can be given by where mi is the mass of…

Q: The cantilevered W530x 150 beam shown is subjected to a 8.3-kN force F applied by means of a welded…

A: The magnitude of force is 8.3 kN

Q: Find the x- and y-coordinates of the center of gravity of a4.00-ft by 8.00-ft uniform sheet of…

A: Consider the two rectangles, the big rectangle have area of 16 square feet ( 4.00 ft x4.00 ft) and…

Q: The forearm of length Larm=35.4 cm shown in the figure is positioned at an angle θ with respect to…

Concept explainers

Center of Gravity of a system

The centre of gravity is a property that is based on the geometry of a rigid body or any particle. It is described as an equilibrium point or a hypothetical location where the total weight of the body is concentrated.

Question

100%

An athlete holds a 7.5-kg shot put in his hand with his lower arm horizontal, as shown in the
figure. His lower arm has a mass of 2.8 kg and its center of gravity (or center of mass) is 12 cm
from the elbow-joint pivot. How much force must the extensor muscle (which is FM in the
figure) in the upper arm exert on the lower arm?

Choices:

500 N

2000 N

1500 N

2500 N

1000 N

Show complete solution and free body diagram

2.5 cm
30.0 cm-
Elbow
Lower
joint
FM
arm
Upper -
arm

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

In the Figure below a distribution of four point charges is given. Find the net Voltage at the origin. Given ket = 9 × 10⁹ Nm² e = −1.6 × 10-¹⁹ C 1µm 10-6m Give your answer in milli - Volts =
O, JUZ 10:03 AM RESULTANT OF FORCE SY... o Figure P-007 2. Determine the magnitude of the resultant force acting on the screw eye and its direction measured clockwise from the x-axis. Answer: 2AN 6AN
Q5: Two airplanes are in planar motion (They move only in the x-y plane). Aircraft A is in a steady climb and has a speed of 300km/h, while Aircraft Bis in a looping maneuver in a perfect circle with radius 500m and has a speed of 200km/h. a. Express the velocity and acceleration vectors of each plane (as observed from earth) in the coordinate systems attached to each plane. b. Express the velocity vector of aircraft A in the coordinate system of aircraft B (Oxy.) for the instant shown. c. What is the relative velocity of aircraft A as observed from aircraft B? Write it in the coordinate system attached to aircraft B. d. What is the relative velocity of aircraft B with respect to aircraft A, when written in the coordinate system attached to aircraft A?
40 75 1 RM m Ru w Hon R 2 if R=30_, find Req between 1 and 2 "
Let AI represent the density of aluminum and Fe that of iron. Kind the radius of a solid aluminum sphere that balances a solid iron sphere of radius rFe on an equal-arm balance.
y -L/2 +L/2
Ans those in one line pls!
According to the information. Can you solve the problem?
Please provide correct solution in 30 minutes and get thumb up
Only ans A pls ty
12. Find o (in degrees). y hip (1.1, 0.8) knee (1.35, 0.51) ankle (1.21 0.15) (0, 0)! X Copyrighte 2015 Woltes Kluner - All Rights Reserved
3. If F = grad (m), and G is the rot (H), which of the following is true? A. VX F = V ·G B. Vx G = V· F C. vF = V·F D. G.H = DNE