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Mechanics

Space

 Space exploration: “Scientific study of the space using especially developed technology is called space exploration.”Do you know that all stars,the sun,the Moon,the earth,all planets and satellites are called heavenly bodies?The heavenly bodies are moving in unimaginable vast space universe. The sun,the planets,and their moons are the largest objects in the solar system.But asteroids and comets are the smaller parts of ...

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Star

What are stars? On the clear night we can see a cloudy band that stretches North to South across the sky.in fact we are seeing part of our own galaxy,the Milky way.there countless stars in our galaxy. We cannot see our galaxy as a whole, but scientists can see many other galaxies in the sky. We see many twinkling lights ...

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Newton’s law of universal gravitation formula

What is Gravitation? Gravitation or gravity is defined as: “The force of attraction between any two objects in the universe.” History: From at least the time of the ancient Greeks,two problems were the subjects of searching inquiry: The tendency of objects such as stones to  fall to earth when released. The motions of the planets,including the sun and the moon,which ...

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What is force of friction?

What is friction in physics? “The force that opposes the motion of moving objects is called friction.” Have you ever noticed why a moving ball stops?Why bicycle stops when the cyclist stops pedaling?Naturally there must be some force that stops moving objects.Since a force not only moves an object but also stops moving object.Friction is a force that comes into ...

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what is the law of conservation of momentum

What is momentum? “Momentum of a body is the quantity of motion it possesses due to its mass and velocity.”We are aware of the fact that moving object possesses a quality by virtue of which it exerts a force on anything that tries to stop it.The faster the object is travelling ,the harder is to stop it.Similarly,if two objects move ...

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Different types of forces and their examples

What is Force? “A force moves or tends to move,stops or tends to stop the motion of object.The force can also change the direction of motion of an object.”It can also change the shape or size of a body on which it acts. In classical physics real forces are defined by a set of axioms,Newton’s laws of motion,with reference to ...

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Projectile motion equations

Projectile: A body thrown at a some angle θ above or below the horizontal such that (0 < θ < π/2) and moves freely under the action of gravity is called projectile. What is projectile motion? “Projectile motion is two dimensional motion under constant acceleration.”or When a body is thrown vertically upward then it follows a curved path such a motion of body is called ...

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Kinematic equations problems

5 kinematic equations: Kinematics is the branch of mechanics dealing with the motion of bodies without reference to mass or force.There are three basic equations of motion for bodies moving with uniform acceleration.These equations relate initial velocity,final velocity,acceleration,time and distance covered by a moving body.To simplify the derivation of these equations,we assume that the motion is along a straight line.Hence,we ...

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what does acceleration mean?

What is acceleration in physics? “Acceleration is defined as the rate of change of velocity of a body.”In many cases the velocity of a body changes  due to a change either in its magnitude or direction or both.The change in the velocity of a body causes acceleration in it.If an object is moving at a constant speed but changes its ...

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What is the difference between speed and velocity

What is  velocity? Velocity is defined as:”The rate of displacement of a body is called its velocity.”The velocity tells us not only the speed of a body but also the direction along which the body is moving.Velocity of a body is a vector quantity.It is equal to the displacement of a body in unit time. What is the formula for ...

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