QUESTION: Calculate the ratio of the electrostatic to gravitational interaction forces between two electrons, between two protons. At what value of the specific charge of a particle would these forces become equal (in their absolute values) in the case of interaction of identical particle. To solve this problem, you must have an idea of Coulomb’s
I.E. Irodov: Question Number 3.1 Read More »
Instantaneous Speed It is the speed of a particle at any instant of time, . If is the distance traveled by the particle in a very small time, , then the instantaneous speed of the particle at that time is given by; That is, it is the rate of change of the distance with respect
Instantaneous Speed, Instantaneous Velocity, and Instantaneous Acceleration Read More »
Activity Suppose you have a gun in your hand and you are going to shoot at a big wooden block (as shown in the animation below). https://eduvigyan.com/wp-content/uploads/2022/03/Activity_eqn-of-kinematics_1_com.mp4 You notice that either the bullet comes out of the block or it fully stopped inside it. It means that the speed of the bullet is continuously decreasing
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When a Golf player hits a Golf ball, a baseball player hits a baseball or a tennis player hits a tennis ball then you can notice that the motion of these balls are of the same kind and it is called a Projectile motion. What is Projectile Motion? When you throw an object at an
When you sit on a moving train and you are looking outside from the window of your train then you see that everything is speeding except your train. And if suddenly another train which is coming from the opposite direction crosses you then the velocity of another train appears to be quite larger than it
In 1687, Isaac Newton revolutionized scientific thinking by formulating the laws of motion and universal gravitation published in his book Principia. Today, more than 300 years later too, if we want to describe the effect of forces on any moving or non-moving things around us then we take the help of Newton’s Laws of Motion.
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The work-energy theorem states that the change in kinetic energy of an object is equal to the net work done by all the forces on the object. If we divide the forces into three categories, conservative, non-conservative and external forces, then from the work-energy theorem , Where is the work done by the non-conservative force,
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The perpendicular axis theorem states that the moment of inertia of a planar lamina (2-dimensional object) about an axis perpendicular to its plane and passing through the origin of two mutually perpendicular axes, lying in the plane of the object, is equal to the sum of the moments of inertia of the lamina about axes
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The parallel axis theorem states that the moment of inertia of a rigid body about an axis parallel to the axis passing through its center of mass is equal to the sum of the moment of inertia of the object about the axis passing through the center of mass and product of the mass of
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Rotational kinetic energy is a part of the total kinetic energy of a rolling object and it is due to the rotation of the object. The rotational kinetic energy of an object is given by; Where is the moment of inertia of the body about the axis of rotation, and is the angular velocity
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