Inertia

Good Essays
The meaning of inertia

Inertia is the property of an object which resists a change in its motion.
If it is at rest it tends to remain at rest , if it is moving it tends to continue moving.
Or
Inertia is the reluctance of an object to move once it is at rest or the reluctance of an object to stop once it is in uniform velocity.

Explanation of inertia by Newton’s First Law of Motion

Newton’s First Law of Motion states that “an object will remain at rest or continue with a constant speed in a straight line unless acted on by an unbalanced force or if the external force acting on the object is zero”

Relationship between mass and inertia

The mass of a body is a measure of its inertia. If a body has a small mass, it will have a small inertia; if its mass is large, then so is its inersia.

Some examples of situations involving inertia

Example 1
[pic]
Observation: The coin drops vertically into the glass .
Explaination : The inertia of the coin causes it remain at rest . The coin drops vertically into the glass due its weight.

Example 2
[pic]
Obesrvation : The other blocks fall vertically onto the table.
Explaination : The inertia of the wooden blocks causes its remain at rest. The weight of other blocks makes them fall Vertically onto the table.

Example 3

Observation : If some ketchup is stuck in a bottle, it can be dislodged by turning the bottle upside down , thrusting it downwards and stopping suddenly.
Explanation : The inertia of the ketchup causes it maintain its velocity while the bottle is stopped.

Example 4

Observation: When a driver inside a car applies brake Suddenly , the driver and the passengers are surged forwards. Similarly ,when the car accelerates , the occupants will move backwards.

Explanation: The inertia of the driver and passengers cause they maintain their original motion (original

You May Also Find These Documents Helpful

  • Better Essays

    Moment of Inertia

    • 1767 Words
    • 8 Pages

    MOMENT OF INERTIA Chua, Richard Janssen J., PHY11L/A3 chardsenchua77@yahoo.com Abstract The moment of inertia, or also known as the rotational inertia, is the rotational analog of a rigid body to a linear or an angular motion. It is one of the fundamentals of the dynamics of rotational motion. The moment of inertia must always be in a specified chosen axis of rotation. The point of motion is basically defined as the relationship between mass and the perpendicular distance to the rotational…

    • 1767 Words
    • 8 Pages
    Better Essays
  • Satisfactory Essays

    Moment of Inertia

    • 253 Words
    • 2 Pages

    Moment of Inertia Formula The Moment of inertia is the property by the virtue of which the body resists angular acceleration. In simple words we can say it is the measure of the amount of moment given to the body to overcome its own inertia. It’s all about the body offering resistance to speed up or slow down its own motion. Moment of inertia is given by the formula Where R = Distance between the axis and rotation in m M = Mass of the object in Kg. Hence the Moment of Inertia is given in Kgm2…

    • 253 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    moment of inertia

    • 639 Words
    • 3 Pages

    Moment of Inertia Academic Resource Center What is a Moment of Inertia? • It is a measure of an object’s resistance to changes to its rotation. • Also defined as the capacity of a cross-section to resist bending. • It must be specified with respect to a chosen axis of rotation. • It is usually quantified in m4 or kgm2 Quick Note about Centroids…. • The centroid, or center of gravity, of any object is the point within that object from which the force of gravity appears to act. •…

    • 639 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Moment of Inertia

    • 715 Words
    • 4 Pages

    ­­­Moment of Inertia 1. Abstract The goal of this study is to understand the transfer of potential energy to kinetic energy of rotation and kinetic energy of translation. The moment of inertia of the cross arm my group measured with the conservation of energy equation is: 0.01044 kg/m2 (with the mass of 15g), 0.01055 kg/m2 (with the mass of 30g), which is kind of similar to the standard magnitude of the moment of inertia of the cross arm: 0.0095 kg/m2 (Gotten by measuring the radius and the mass…

    • 715 Words
    • 4 Pages
    Satisfactory Essays
  • Good Essays

    Laws of Inertia

    • 1869 Words
    • 8 Pages

    Inertia (Law of Inertia) Name _____________________ Section _________ Date ______ The law of acceleration explains how a net force makes a mass accelerate. It shows how the magnitude of the acceleration depends on the magnitude of the force (directly proportional) and on the magnitude of the mass (inversely proportional). Acceleration happens only when there is an unbalanced force. Where All Forces Are Balanced No change of velocity occurs when the forces acting a body are balanced…

    • 1869 Words
    • 8 Pages
    Good Essays
  • Good Essays

    Moment of Inertia

    • 1135 Words
    • 5 Pages

    Sadie D. Hood Lab 8: Moment of Inertia Partner: Florence Doval Due 16 November 2011 Aims: To use a centripetal force apparatus to calculate the moment of inertia of rotating weights, using theories derived from ideas of energy transfer (Im = MR2 (g/2h)(t2-t02)) and point mass appoximation (m1r12 + m2r22). Set Up Procedure First we measured the weights of two masses and wingnuts that secure them. Then we placed one of the masses on the very end of a horizontal rod on the centripetal force apparatus…

    • 1135 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Essay on Inertia

    • 424 Words
    • 2 Pages

    person, the easier it will be to stop. We all experience this every day. The reason for this, is because of the inertia of the moving object. An object will continue to move at a constant velocity unless acted upon on an external force. The magnitude of this force is dependent on the weight of the object. It makes logical sense to think more mass will require more energy. The inertia of an object is it’s resistance to change in motion, if an object is stationary, it will stay stationary. If an object…

    • 424 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Thermal Inertia

    • 455 Words
    • 2 Pages

    1. Thermal inertia is a measure of the thermal mass and the velocity of the thermal wave which controls the surface temperature of a material. In heat transfer, a higher value of the volumetric heat capacity means a longer time for the system to reach equilibrium. 2. The ocean acts as a massive heat-retaining solar panel. 3. Salinity, temperature and depth all affect the density of seawater. 4. A pycnocline is the cline or layer where the density gradient (∂ρ⁄∂z) is greatest within a body of water…

    • 455 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Inertia Inertia is the tendency for a body to either remain at rest or move in a straight line at a constant speed, unless acted up by an unbalanced force. In both cases, the item has an acceleration of zero. Inertia is not a force, but rather a resistance to a change in velocity. In other words, the object wants to stay put or stay constant, and inertia is what happens when a force gives it acceleration. An example of inertia in the physical world happens while riding in a car. The driver…

    • 499 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Mass Moment of Inertia

    • 1282 Words
    • 6 Pages

    Title: Mass Moment of Inertia Objective: To determine mass moment of inertia of a part using experimental method. Theory: If a part has been designed and built, its mass moment of inertia can be determined approximately by a simple experiment. This requires that the part be swung about any axis (other than one that passes through its CG) parallel to that about which the moment is sought and its period of pendular oscillation measured. Figure 1 shows a part of connecting rod suspended on a knife-edge…

    • 1282 Words
    • 6 Pages
    Good Essays