A 0.8-gram package lying on a horizontal surface is attached to a horizontal string which passes over a smooth pulley. When a mass of 0.0006 KG is attached to the other end of the string, the package is on the point of moving. Find μ, the coefficient of friction and also define the friction and it’s any two types with at least one relevant example of each which are used in the
To find the coefficient of friction, we need to use the equation of motion. First, let's define some variables:
m1 = mass of the package = 0.8 grams = 0.0008 kg
m2 = mass attached to the string = 0.0006 kg
μ = coefficient of friction
Now, we can use Newton's second law of motion to set up an equation:
m2 * g - μ * m1 * g = m1 * a
Here, g represents the acceleration due to gravity, and a represents the acceleration of the system.
Since the package is on the point of moving, the acceleration is zero (a = 0). Therefore, our equation becomes:
m2 * g - μ * m1 * g = 0
Now we can solve for μ:
μ = m2 / m1
Substituting the given values:
μ = 0.0006 kg / 0.0008 kg
μ = 0.75
Hence, the coefficient of friction (μ) is 0.75.
Now, let's define friction and its two types:
Friction is a force that opposes the relative motion of two surfaces in contact. It occurs due to the roughness or irregularities present on the surfaces. The two main types of friction are:
1. Static Friction: Static friction is the force that keeps an object at rest when a force is applied to move it. It needs to be overcome before motion can occur. For example, when you push a heavy object, it does not move initially until the applied force overcomes the static friction.
2. Kinetic Friction: Kinetic friction is the force that opposes the motion of an object when it is already moving. It is generally smaller than static friction. For example, when a car is moving on the road, the kinetic friction between the tires and the road surface allows the car to slow down or stop.
I hope this helps! Let me know if you have any further questions.