Pulleys relating to physics question

In summary, the tension in the string (T) can be calculated by using the equation Fnet = ma and is equal to 4.37 N.
  • #1
moe6142
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Diagram
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Homework Statement


Consider the two body system above. There is a 0.25kg object accelerating across a rough surface. The sliding object is attached by a string to a 0.1kg object which is suspended over a pulley. the coefficient of kinetic friction( arrow on diagram) is 0.183.

Homework Equations


Fg=mg
Fnet=ma


The Attempt at a Solution


i tried using the formula ff=ufg but i was still stuck
 
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  • #2
.The solution is to calculate the tension in the string (T) by using the equation Fnet = ma. The net force in the x direction is the sum of the friction force and the tension. In this case, the acceleration (a) is equal to zero since the object is sliding at constant velocity. This means that the friction force and the tension must be equal and opposite. Therefore, T = ufg = 0.183*0.25kg*9.8m/s2 = 4.37 N.
 

What is a pulley?

A pulley is a simple machine that consists of a wheel with a grooved rim and a rope or cable that runs along the groove. It is used to change the direction of a force, making it easier to move heavy objects.

What are the different types of pulleys?

There are three main types of pulleys: fixed, movable, and compound. Fixed pulleys have a stationary axle and are used to change the direction of a force. Movable pulleys have a movable axle and are used to increase the mechanical advantage of a system. Compound pulleys combine both fixed and movable pulleys to provide a greater mechanical advantage.

How do pulleys affect the amount of force needed to lift an object?

Pulleys can reduce the amount of force needed to lift an object by distributing the weight of the object over multiple ropes and pulleys. The number of ropes supporting the object is known as the mechanical advantage, and the greater the mechanical advantage, the less force is required to lift the object.

What is the equation for calculating the mechanical advantage of a pulley system?

The mechanical advantage of a pulley system can be calculated by dividing the weight of the object being lifted by the force exerted on the rope. This can be represented by the equation MA = W/F, where MA is the mechanical advantage, W is the weight of the object, and F is the force exerted on the rope.

How do pulleys relate to other concepts in physics?

Pulleys are closely related to other concepts in physics, such as work, energy, and mechanical advantage. They can also be used to understand and apply principles of torque, force, and motion. Additionally, understanding how pulleys work can help in the design and construction of more complex machines and systems, such as cranes and elevators.

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