Sticking of a Person with the Wall of Rotor A person with a mass m stands in contact against the wall of a cylindrical drum (rotor). The coefficient of friction between the wall and the clothing is . If rotor starts rotating about its axis, then person thrown away from the center due to centrifugal Read more about Sticking of a Person with the Wall of Rotor[…]
Impulse 1) When a large force works on a body for every small time interval, it is called as impulsive force. An impulsive force does not remain constant, but changes first from zero to maximum and then from maximum to zero. In such case we measure the total effect of force. 2) Impulsive of a Read more about Impulse[…]
Non Uniform Circular Motion If the speed of the particle in a horizontal circular motion changes with respect to time, then its motion is said to be non-uniform circular motion. Consider a particle describing a circular path of radius r with center at O. let at an instant the particle be at P and be Read more about Non Uniform Circular Motion[…]
Energy of Projectile A body which is in flight through the atmosphere under the effect of gravity alone and is not being propelled by any fuel is called projectile. If the force acting on a particle is oblique with initial velocity then the motion of particle is called projectile motion. When a projectile moves upwards Read more about Energy of Projectile[…]
Sticking of a Block with Accelerated Cart Acceleration of an object is defined as its rate of change of velocity at that instant. It is denoted as “a” and the units are. Any object experiencing an unbalanced force, constant or variable show acceleration (or) Any object undergoing a change in its velocity either magnitude or Read more about Sticking of a Block with Accelerated Cart[…]
Stopping Distance When an object is moving with a certain velocity then suddenly brakes are applied, and then object stops completely after covering a certain distance. This is called as stopping distance. It is the distance travelled between the time when an object deiced to stop a moving vehicle and the time when the vehicle Read more about Stopping Distance[…]
Important Terms Regarding Wave Motion 1) Amplitude (a): Maximum displacement of a vibrating particle of medium from its mean position is called amplitude. 2) Wavelength : Wavelength is equal to the distance travelled by the wave during the time in which any one particle of the medium completes one vibration about its mean position (or) Read more about Important Terms Regarding Wave Motion[…]
Emissive Power, Absorptive Power and Emissivity If temperature of a body is more than its surrounding then body emits thermal radiation. 1) Monochromatic Emittance or Spectral emissive power: For a given surface it is defined as the radiant energy emitted per sec per unit area of the surface with in a unit wavelength around i.e. Read more about Emissive Power, Absorptive Power and Emissivity[…]
Streamline, Laminar and Turbulent Flow 1) Stream Line Flow: Stream line flow of a liquid is that flow in which each element of the liquid passing through a point travels along the same path and with the same velocity as the preceding element passes through that point. A streamline may be defined as the path, Read more about Streamline, Laminar and Turbulent Flow[…]
Specific Heat of a Gas For solids and liquids, we define the specific heat capacity as the quantity of energy that will raise the temperature of unit mass of the body by 1K. For gases, however, it is necessary to specify the conditions under which the change of temperature takes place, since a change of Read more about Specific Heat of a Gas[…]