Scalar and Vector quantities What is scalar quantity? Those quantities which only need their value to be expressed are known as scalar quantities. Physical quantities which can be fully expressed by a magnitude only are called scalar quantities. Example: Length, mass, work, energy time, temperature, etc. What is vector quantity? Those quantities which require value … Read more
Different Types of Motion Linear motion It is an example of easiest type of motion. If anything moves along a straight line then its motion is called a linear motion. If an object is pushed off on a plane surface then it moves along a straight line. If a ball is allowed to fall from … Read more
We have already mentioned that an amazing example of uniform acceleration is acceleration due to gravity g. Due to its effect an object falls downward when it is released from above the earth surface.Observing these types of falling bodies Galileo invented three laws. The laws can be used in case of bodies falling freely. The … Read more
Distance and Displacement What is distance? What is displacement? The advancement of an object with respect to its surrounding in a specific direction is its displacement. The change in the position of an object along a definite direction with time with respect to some frame of reference is called displacement of that object.
Acceleration and Deceleration or Retardation What is Acceleration? Acceleration is the rate of change of velocity with time. What is Deceleration? Deceleration is the rate of decrease of velocity with time. What is Uniform acceleration? If the velocity of an object towards a specific direction increases at the same rate it is a uniform velocity. … Read more
Speed and Velocity What is speed? Speed is the rate of change of distance with respect to time. What is the unit of speed? The SI unit of speed is meter/second (m/s). What is the dimension of speed? The dimension of speed, [v] = LT-1. What is instantaneous speed? Instantaneous speed refers to the speed … Read more
Rest and Motion What is position? Position is a place where someone or something is located or has been put. Position is a vector quantity because it has direction. What is rest? When an object does not change its position with respect to time, then it is at rest. With the change of time if … Read more
Why is the value of g is different in polar, equinoctial, and tropical regions? As the earth is not perfectly round, the polar regions are a bit compressed, therefore the radius of the Earth R is not constant. Hence the value of g is not the same at all places on earth. The value of … Read more