- #1
Your attempt is too vague to be sure.lc99 said:is my setup correct?
I agree.Khashishi said:They probably want the kinetic energy of mass 2 at the moment it is 10 cm below the starting point.
How come the intial energy is 0? there is gravitational potential energy thoughKhashishi said:This question is vague. It doesn't say whether to include the potential energy in the result. Nevertheless, you have to press onward and guess what they want. They probably want the kinetic energy of mass 2 at the moment it is 10 cm below the starting point.
To do this, you should write the initial and final energies and set them equal to each other. The initial energy can simply be set to 0.
The final energy will consist of: potential energy of the two masses, kinetic energy of the two masses, rotational kinetic energy of the shaft. Write them out fully.
Rotational dynamics is a branch of physics that studies the motion of objects that rotate or spin around a fixed axis. It involves the application of Newton's laws of motion to objects with rotational motion.
The key concepts in rotational dynamics include torque, moment of inertia, angular velocity, and angular acceleration. These concepts are used to describe the rotational motion of objects and to solve problems related to rotational dynamics.
Rotational dynamics is different from linear dynamics in that it deals with the motion of objects that rotate around a fixed axis, while linear dynamics deals with the motion of objects in a straight line. Additionally, rotational dynamics involves the use of different equations and concepts, such as torque and moment of inertia, compared to linear dynamics.
Some real-life examples of rotational dynamics include the motion of a spinning top, the rotation of a wheel on an axle, and the motion of planets around the sun. Other examples include the motion of a spinning gyroscope and the rotation of a baseball thrown by a pitcher.
To apply rotational dynamics to solve problems, you can use the equations and concepts learned in this branch of physics. Start by identifying the axis of rotation and the forces acting on the object. Then, use the equations for torque and angular acceleration to solve for the desired quantity. It is also important to draw clear diagrams and use the correct units in your calculations.