Impulse of ForceFrom the previous section, you have seen that Newtons Second Law can be summed up by the formula F = ma.When a net force acts on a body, it accelerates in the direction of the force. By definition, acceleration, a is the rate of change i…

Which Instrument is Used to Measure the Temperature? Temperature is a measure of the degree of hotness of an object.A hot object has a higher temperature than a cold object.When two objects are in thermal contact, heat energy is transferred from the obje…

Equations Of MotionMotion under uniform acceleration1st Equation of motion For an object moving with uniform velocity, v, its displacement, s after time, t is given by: s = v × t Consider a body having initial velocity ‘u’. Suppose it is subjected to a u…

What Is EchoThe sound returning back towards the source after suffering reflection from a distance obstacle (a wall, a row of building etc.) is called an echo.When the sound is reflected repeatedly from a number of obstacles, more than one echoes, calle…

What Is Acceleration Rate of change of velocity is called acceleration. It is a vector quantity \(i.e.\text{    }a=\frac{v-u}{t}\) where u is the initial velocity of the object, v is its final velocity and t is the time taken.Unit of acceleration = m/s2 …

What is the Relationship Between Temperature and Pressure?Figure (a) shows a man measuring the pressure of the air in his car tyre before starting on a long journey. After reaching his destination, he measured the pressure again and the pressure gauge s…

How do you calculate the total resistance of a parallel circuit?The Effective Resistance of Resistors Connected in ParallelThere are three important characteristics in a parallel circuit: (a) The potential difference is the same across each resistor. (b)…

What is EnergyDefinition: Energy is the ability to do work. The amount of energy possessed by a body is equal to the amount of work it can do when its energy is released. Thus, energy is defined as the capacity of doing work. Energy is a scalar quantity…

Being Aware of the Need for Safety Features in VehiclesWhile striving to improve the performance of their cars, car manufacturers also place great importance on the safety features of the cars. A good car safety system that can prevent injuries to passen…

Analysing Forces in EquilibriumThe forces acting on an object are in equilibrium when the resultant force acting on the object is equal to zero. An object at rest is in equilibrium. Figure shows some objects resting on a table. For the case of the book, …