Physics

QUESTION-11 Why does a sheet of paper fall slower than one crumpled into a ball? SOLUTION: Be cause of the effect of air resistance, Air resistance (force exerted by air) acts in the direction of the object's motion. The magnitude of air resistance is determined by the shape and area of the object, as well as the density and viscosity of the air. In the case of a sheet of a paper, greater air resistance due to the larger surface area slows the fall. In the case of a crumpled paper ball, lower air resistance due to smaller surface area allows it to fall faster. QUESTION-14 A stone is released from the top of a tower of height 19.6 m.Calculate its final velocity just before touching the ground. SOLUTION: QUESTION-15 A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 m/s 2 , find the maximum height reached by the stone. What is the net displacement and the total distance covered by the stone? SOLUTION: QUESTION-16 Calculate the force of gravitation

DIFFERENTIATION FORMULA OF 'tan x' DIFFERENTIATION FORMULA  OF  'cot x '

DENSITY - DEFINITION, SYMBOL, FORMULA, UNITS AND DIMENSION

TRIGONOMETRIC IDENTITIES TRIGONOMETRY: What exactly is trigonometry? Trigonometry is primarily concerned with angles and triangles.The study of angles and how they affect various quantities and measures is known as trigonometry.Trigonometry is used to learn about triangles and their relationships What are the trigonometric applications? The trigonometric method is used to determine the height of a building or mountain, as well as the length of a beam required to span a specific distance. The trigonometry method is used to calculate an object's torque and forces.Engineers use trigonometric methods to solve design and construction problems involving structures such as bridges and buildings. A navigation method that calculates the distance between a receiver and a satellite using the law of cosines. Trigonometric methods are used by astronomers to calculate the distances of stars and planets from Earth. Physicists use trigonometry to study wave behaviour, analyse signals, and predict