Question

what is the definition of mechanics,kinematics
solving problems, instantaneous velocity,
instantaneous speed,
instantaneous acceleration,
significant figures,
scientific notation,
standard scientific notation,?

Answer 1

a) mechanics : In mechanics we study the behaviour of physical bodies when subjected to forces or displacement and their subsequent effects on the surroundings.

b) kinematics : Kinematics is a branch of classical mechanics that describes the motion of points, bodies, and systems of bodies without considering the mass of each or the forces that caused the motion.

c) Instantaneous velocity : Instantaneous velocity is the velocity of an object in motion at a specific point in time. This is determined similarly to average velocity, but we narrow the period of time so that it approaches zero. If an object has a standard velocity over a period of time, its average and instantaneous velocities may be the same.

d) instantaneous accelaration : instantaneous acceleration of an object is also equal to the second time derivative of the position of the object at the given instant.

e) significant figures : it is the figure of each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit.

f) scientific notation : Scientific notation is a way of expressing numbers that are too big or too small to be conveniently written in decimal form

g) standard scientific notation : To change a number from scientific notation to standard form, move the decimal point to the left (if the exponent of ten is a negative number), or to the right (if the exponent is positive). You should move the point as many times as the exponent indicates.