CP A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a ( Fig. P27.72 ). The gravitational force on the bar acts in the − y -direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle θ = 30.0° above the horizontal? Use your result from Problem 27.70. (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b to a ? Figure P27.72
CP A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a ( Fig. P27.72 ). The gravitational force on the bar acts in the − y -direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle θ = 30.0° above the horizontal? Use your result from Problem 27.70. (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b to a ? Figure P27.72
CP A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a (Fig. P27.72). The gravitational force on the bar acts in the −y-direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle θ = 30.0° above the horizontal? Use your result from Problem 27.70. (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b to a?
Figure P27.72
Definition Video Definition A state wherein a body is not experiencing any resultant angular acceleration. If the net torque acting on the body is zero, then the body is said to be in rotational equilibrium. If the body is stationary and net torque is zero, then the body is in static rotational equilibrium. If the body is moving with constant velocity and net torque is zero, then, the body is said to be in dynamic rotational equilibrium. Video
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.
What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY