What are the three laws of newton with an example of each one?

Answer 1

1st law: "An object in motion will remain in motion unless an external force acts upon it. " Perhaps the hardest of the 3 laws to demonstrate on Earth where friction and gravity are ever present (external forces), but in outer space far away from any planets or stars, an object given an initial push (force) will continue forever in the same direction at a constant speed.

2nd law: "F = ma; acceleration is proportional to force and inversely proportional to the mass of the accelerated object ." You are pushing a box across a frictionless surface, if you want to speed up the box faster (increase in acceleration), you push harder (increase in force). If the box was replaced with a heavier box (increase in mass), you have to push harder (increase in force) to speed it up at the same rate as before.

3rd law: "For every action there is a equal and opposite reaction." Perhaps the most misconceived law by the public, this law does not mean if the earth pulls you down by the virtue of its mass, it also "hold" you up.

This law means the force that is applied has an equal and opposite counterpart. For instance, if you apply a force to a object, the object applies the same force on you. Therefore, the earth applies a gravitational force on you, and you apply an equal and opposite force on the earth! This force is not noticed due to the second law, the earth is approximately 100,000,000,000,000,000,000,000 (1022) times more massive than any of us but the force is still there.

Answer 2

Newton's first law states that an object in motion stays in motion. Newton's second law defines an object's force as being that of its mass multiplied by acceleration. Newton's third law states that for every action there is an equal and opposite reaction.

Answer 3

1) An object in motion/at rest will stay in motion/at rest unless acted upon by an outside force. Example: If a ball is rolling down a hallway, someone will need to physically stop it/have it run into something/slow down because of friction.

2) If an object is affected by an outside force, it will move in the direction of that force. Example: When you're pushing a shopping cart and you yank it to an abrupt stop, it will travel in your direction. (The heavier the shopping cart, the harder it will be.)

3) Every action has an equal and opposite reaction. Example: A gymnast pushes down on uneven bars. The bars push back on the gymnast with an equal force.

=D

Answer 4

Example for first law

Push a ball along the floor. It moves but comes to rest after some time, even when there is no apparent external force acting on it. But then there is an external force. This force is friction. If we remove friction the ball will not stop, unless another force were to make it stop.

Example for Second Law is a free falling body under the influence of gravitational force, as there is change in momentum of body which is proportional to gravitational force.

Example for Third law When you try to push a wall, it pushes you right back! The harder you push the more pressure is felt by your hands.

Answer 5

I.Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

II.The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

III. For every action there is an equal and opposite reaction.

Newtons First Law Examples: Moving Cars, Rockets, Balls, Mass On String,

Newtons Second Law Examples: Football Players, Cars Colliding, Golf, Throwing a Ball, Collisions,

Newtons Third Law Examples: Balloons, Sail Boats, Weapons Recoiling, Rocket Lift Off

Answer 6

The First Law of Motion: An object in motion will keep moving unless a net force acts on it. An object at rest will stay at rest until a net force acts on it. The Second Law of Motion: The net force equals the mass of the object times its acceleration.

The Third Law of Motion: When one object exerts a force on a second object, the second object exerts a force on the first object.

(This law is sometimes called the action-reaction law of motion)

Answer 7

1st. An object at rest stays at rest and an object in motion will remain in motion in a straight line unless acted on by an outside force.

2nd. When a force is applied to an object it will create an acceleration that is inversely proportional to the mass of the object (F = ma).

3rd. For every action there is an equal and opposite reaction.

These are universal laws. They apply to all objects.

1st. Rocks don't move on their own, neither do any other objects. They all require an outside force to move them.

2nd As the objects move they are accelerated by whatever push is given to them. Harder push equals more acceleration.

3rd. Jump off of a canoe in the middle of a lake. You push the canoe in one direction and you move in the opposite direction.