You hold a softball with a weight of 1.80 N in your hand as shown in the figure. Your arm is moving, but at the instant shown, your arm is horizontal. Consider your forearm and hand to be a uniform rod with a mass of 1.65 kg and the distance between your elbow joint and the ball in your hand is  2L = 26.0 cm.  Your biceps exerts an upward, vertical force of 13.5 N on your forearm and is attached a distance of d = 2.60 cm from your elbow.   (a) Using your elbow joint as the axis of rotation, determine the magnitude of the net torque acting about your elbow due to the weight of your forearm/hand, the weight of the ball, and the force applied by your bicep. N · m (b) In which direction will your forearm and hand rotate, given the signed value of the net torque calculated in part (a)? clockwise counterclockwise     no rotation

Question

You hold a softball with a weight of 1.80 N in your hand as shown in the figure. Your arm is moving, but at the instant shown, your arm is horizontal. Consider your forearm and hand to be a uniform rod with a mass of 1.65 kg and the distance between your elbow joint and the ball in your hand is 

2L = 26.0 cm.

 Your biceps exerts an upward, vertical force of 13.5 N on your forearm and is attached a distance of d = 2.60 cm from your elbow.

 
(a) Using your elbow joint as the axis of rotation, determine the magnitude of the net torque acting about your elbow due to the weight of your forearm/hand, the weight of the ball, and the force applied by your bicep.
 N · m

(b) In which direction will your forearm and hand rotate, given the signed value of the net torque calculated in part (a)?
clockwise
counterclockwise    
no rotation

Expert Answer

1 Rating

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

Related Physics Q&A

Find answers to questions asked by students like you.

Q: A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west direction is acted on ...

A: The expression for the net torque about the center of mass of the beam,

Q: Chapter 25, Problem 001 The two metal objects in the figure have net charges of +99 pC and -99 pC, w...

A: Part aGiven:Two metal objects are placed having net charge +99 pC and -99 pC resulting in potential ...

Q: the position of a mass hanging from a spring as it oscillates has the form x(t)=0.2cos(6.7t). (All q...

A: The position of a mass hanging from a spring is given below.

Q: Data Table 1 Trial No. f (Hz)2 egment ength 33.3 5 33.S Data Analysis 1. Plot a graph of Frequency s...

A: 1.The plot of f  2 versus n2 is given below.

Q: One of the many isotopes used in cancer treatment is 19879Au79198Au, with a half-life of 2.70 d. Det...

A: The expression for the number of radioactive nuclei,

Q: Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. T...

A: Given:

Q: the x and y components of a vector in a horizontal plane are 4.00 m and 3.00 m, repectively. (a) wha...

A: The x-component of the vector is 4.00 m and the y-component of the vector is 3.00 m. 

Q: Each of the eight conductors in the figure carries 6.89 A of current into or out of the page. Two pa...

A: A dot represents current coming out of the page and the cross represents current going into the page...

Q: A scooter has wheels with a diameter of 120 mm. What is the angular speed of the wheels when the sco...

A: The radius of the scooter wheels is,Substituting the value,