To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°.(a) What is the angular acceleration (in rad/s?) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg · m², and the net force she exerts is 750 N at an effectiveperpendicular lever arm of 1.90 cm? (Ignore gravity)rad/s?(b) How much work (in J) does she do?

Given Data :- The mass of weight lifted by the women is M = 2.50 kg. The angle of flex is θ = 60o.…

To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. (a) What is the angular acceleration (in rad/s³) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg - m², and the net force she exerts is 750 N at an effective perpendicular lever arm of 1.90 cm? (Ignore gravity) rad/s (b) How much work (in J) does she do?

To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. (a) What is the angular acceleration (in rad/s³) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg - m², and the net force she exerts is 750 N at an effective perpendicular lever arm of 1.90 cm? (Ignore gravity) rad/s (b) How much work (in J) does she do?

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section8.5: Relationship Between Torque And Angular Acceleration

Problem 8.2QQ: A constant net torque is applied to an object. Which one of the following will not be constant? (a)...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°.
(a) What is the angular acceleration (in rad/s?) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg · m², and the net force she exerts is 750 N at an effective
perpendicular lever arm of 1.90 cm? (Ignore gravity)
rad/s?
(b) How much work (in J) does she do?

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