oo Sprint 2:38 PM session.masteringphysics.com C Part E Which of the following c
ID: 3281091 • Letter: O
Question
oo Sprint 2:38 PM session.masteringphysics.com C Part E Which of the following choices of pivot point would lead to a torque equation in which the only unknown quantity is the magnitude of the force exerted by the biceps? Submit My Answers Give Up If you choose the elbow as the pivot point, the torque equation will not depend on the (unknown) force Eliminating terms, particularly those involving unknown quantities from the torque equation generally makes it easier to solve. Other choices of pivot would also work, but they might lead to more complicated mathematics In the next part you will be asked to find an expression for the torque about the elbow caused by F v-", and " Keep in mind that a counterclockwise torque is positive. Your sketch of the physical situation should look like that shown in the figure. Part F Determine the sign (+ or-of the torque about the elbow caused by the biceps,th sign of the weight of the forearm, n , and the sign of the weight of the ball, . Express your answers as using+ and - separated by commas. Submit My Answers Give Up
Explanation / Answer
As you need help with F. Here it is
#F
As we can see clearly in the figure.
Torque due to biceps = + positive
Weight of forearm = - (negative)
Weight of ball = - negative
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.