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Thermal stress

Thermal stress- If we clamp the ends of a rod rigidly to prevent its expansion or contraction and then change the temperature, tensile or compressive stress developed is called thermal stress. The rod like to expand or contract but clamps won’t allow it. As shown in fig. To calculate the thermal stress in a clamped […]

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Change of density with temperature

Before to go with tis topic students must know the topic thermal expansion of matter, which is one of the most important topic for thermal properties of matter. To learn the topic Thermal expansion of matter CLICK HERE- After Completing the topic thermal expansion   students must solve some important questions of thermal expansion of matter, […]

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Thermal expansion

Thermal expansion Most of the material expand when their temperature increases. Then the phenomenon of expansion of material when it is heated is known as thermal expansion. 1. Linear expansion– When a rod heated then the temperature of the body increases due to which length of the rod increases , this phenomenon is known as […]

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Magnus effect and dynamic lift

Magnus effect and dynamic lift- The upward force experience by a body when it moves through a fluid is called dynamic lift . Such a lift is felt by airfoil , aircraft win etc. Couse behind it can be explained by Bernoulli’s theorem . It also explain why a spinning ball is deviated from its […]

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Surface energy

Before to learn or to know surface energy students must know surface tension. To know about the surface tension click here- Surface energy- It is given as the work done to increase the unit area of a liquid .Or, It is the energy required to remove a molecule completely from a liquid. Or,  The molecules at […]

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Surface tension

Surface tension–  It is the property of a free surface of liquid to get minimum surface area . The property of a liquid at rest by virtue of which its free surface behaves like a stretched elastic membrane and tries to occupy as small an area as possible called surface tension. As we know in […]

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Newton’s second law of motion is the real law of motion

Newton’s second law of motion is the real law of motion Before to know Newton’s second law of motion is the real law of motion we must know all three equations of motion. To know, Newton’s first law of motion click here– To know, Newton’s second law of motion click here- To know, Newton’s third […]

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Apparent weight of a man in a lift

Apparent weight of a man in a lift In this topic we will discuss about , a man of mass m standing in a lift . What will be its apparent weight of a man in a lift when lift has some motion with uniform acceleration or velocity? But before to know about this topic […]

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Horse and cart problem

Horse and cart problem This is the topic  Horse and cart problem which explain the one of the important illustration of Newton’s third law of motion. But before to learn the topic Horse and cart problem students must know, Newton’s third law of motion. To get the notes on Newton’s third law of motion click […]

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Newton’s third law of motion

Newton’s third law of motion In this topic we will discuss about Newton’s third law of motion and some important illustrations of Newton’s third law of motion . Before to go with this topic students must know Newton’s first and second law . For Newton’s first law and inertia click here- For Newton’s second law […]