- #1
LCSphysicist
- 645
- 161
- Homework Statement
- Summarizing, it is a system with a pulley being pulled by a force F, with two masses hanging.
- Relevant Equations
- F = ma
Xm + XM = 2Xp
Yes, the pulley is accelerating, which if it is assumed that T = F/2 (i don't know why), we can know the acceleration is:Doc Al said:Is the pulley accelerating?
What is the mass of the pulley?LCSphysicist said:Yes, the pulley is accelerating, which if it is assumed that T = F/2 (i don't know why), we can know the acceleration is:
(M+m)F/4Mm - g
why do not you write the 2 Newton law for each bodyLCSphysicist said:Homework Statement:: Summarizing, it is a system with a pulley being pulled by a force F, with two masses hanging.
Relevant Equations:: F = ma
Xm + XM = 2Xp
i don't know how to justify that the tensions in both side are equal to half of the force.
Unwrap the string from around the pulley and place it, together with the weights on an imaginary horizontal flat surface.LCSphysicist said:..., I can find everything that is requested, but there is a big problem, i don't know how to justify that the tensions in both side are equal to half of the force.
Is the pulley assumed to be massless? If so, what will Newton's 2nd law tell you?LCSphysicist said:Yes, the pulley is accelerating, which if it is assumed that T = F/2 (i don't know why),
A pulley is a simple machine that consists of a grooved wheel and a rope or cable. It is used to change the direction of a force and can also be used to lift heavy objects.
A pulley accelerates by using the principle of mechanical advantage. This means that the force needed to lift an object is reduced by the number of pulleys used. As more pulleys are added, the acceleration of the object increases.
A fixed pulley is attached to a stationary object, while a movable pulley is attached to the object being lifted. In a fixed pulley, the direction of the force is changed, but the magnitude of the force remains the same. In a movable pulley, the direction and magnitude of the force are both changed.
The acceleration of an object using a pulley can be calculated by dividing the net force acting on the object by its mass. The net force is the difference between the force applied to the object and the force of gravity pulling the object down.
Pulleys are used in a variety of everyday objects, such as elevators, cranes, and window blinds. They are also used in more complex systems, such as in engines and conveyor belts. In addition, pulleys are used in sports equipment, such as rock climbing gear and weightlifting machines.