Newtons Laws of Motion Newtons Laws of Motion 1st Law of Motion (Law of Inertia) 1st Law
Rawdin, Jeanne, Executive Producer has reference to this Academic Journal, PHwiki organized this Journal Newtons Laws of Motion I. Law of Inertia II. F=ma III. Action-Reaction While most people know what Newton’s laws say, many people do not know what they mean (or simply do not believe what they mean). Newtons Laws of Motion 1st Law An object at rest will stay at rest, in addition to an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced as long as ce. 2nd Law Force equals mass times acceleration. 3rd Law For every action there is an equal in addition to opposite reaction.
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1st Law of Motion (Law of Inertia) An object at rest will stay at rest, in addition to an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced as long as ce. 1st Law Inertia is the tendency of an object to resist changes in its velocity: whether in motion or motionless. These pumpkins will not move unless acted on by an unbalanced as long as ce. 1st Law Once airborne, unless acted on by an unbalanced as long as ce (gravity in addition to air fluid friction), it would never stop!
1st Law Unless acted upon by an unbalanced as long as ce, this golf ball would sit on the tee as long as ever. Why then, do we observe every day objects in motion slowing down in addition to becoming motionless seemingly without an outside as long as ce Its a as long as ce we sometimes cannot see friction. Objects on earth, unlike the frictionless space the moon travels through, are under the influence of friction.
There are four main types of friction: Sliding friction: ice skating Rolling friction: bowling Fluid friction (air or liquid): air or water resistance Static friction: initial friction when moving an object What is this unbalanced as long as ce that acts on an object in motion Slide a book across a table in addition to watch it slide to a rest position. The book comes to a rest because of the presence of a as long as ce – that as long as ce being the as long as ce of friction – which brings the book to a rest position. In the absence of a as long as ce of friction, the book would continue in motion with the same speed in addition to direction – as long as ever! (Or at least to the end of the table top.)
Newtonss 1st Law in addition to You Dont let this be you. Wear seat belts. Because of inertia, objects (including you) resist changes in their motion. When the car going 80 km/hour is stopped by the brick wall, your body keeps moving at 80 m/hour. 2nd Law 2nd Law The net as long as ce of an object is equal to the product of its mass in addition to acceleration, or F=ma.
2nd Law When mass is in kilograms in addition to acceleration is in m/s/s, the unit of as long as ce is in newtons (N). One newton is equal to the as long as ce required to accelerate one kilogram of mass at one meter/second/second. 2nd Law (F = m x a) How much as long as ce is needed to accelerate a 1400 kilogram car 2 meters per second/per second Write the as long as mula F = m x a Fill in given numbers in addition to units F = 1400 kg x 2 meters per second/second Solve as long as the unknown 2800 kg-meters/second/second or 2800 N If mass remains constant, doubling the acceleration, doubles the as long as ce. If as long as ce remains constant, doubling the mass, halves the acceleration.
Newtons 2nd Law proves that different masses accelerate to the earth at the same rate, but with different as long as ces. We know that objects with different masses accelerate to the ground at the same rate. However, because of the 2nd Law we know that they dont hit the ground with the same as long as ce. F = ma 98 N = 10 kg x 9.8 m/s/s F = ma 9.8 N = 1 kg x 9.8 m/s/s Check Your Underst in addition to ing 1. What acceleration will result when a 12 N net as long as ce applied to a 3 kg object A 6 kg object 2. A net as long as ce of 16 N causes a mass to accelerate at a rate of 5 m/s2. Determine the mass. 3. How much as long as ce is needed to accelerate a 66 kg skier 1 m/sec/sec 4. What is the as long as ce on a 1000 kg elevator that is falling freely at 9.8 m/sec/sec
Check Your Underst in addition to ing 1. What acceleration will result when a 12 N net as long as ce applied to a 3 kg object 12 N = 3 kg x 4 m/s/s 2. A net as long as ce of 16 N causes a mass to accelerate at a rate of 5 m/s2. Determine the mass. 16 N = 3.2 kg x 5 m/s/s 3. How much as long as ce is needed to accelerate a 66 kg skier 1 m/sec/sec 66 kg-m/sec/sec or 66 N 4. What is the as long as ce on a 1000 kg elevator that is falling freely at 9.8 m/sec/sec 9800 kg-m/sec/sec or 9800 N 3rd Law For every action, there is an equal in addition to opposite reaction.
3rd Law According to Newton, whenever objects A in addition to B interact with each other, they exert as long as ces upon each other. When you sit in your chair, your body exerts a downward as long as ce on the chair in addition to the chair exerts an upward as long as ce on your body. 3rd Law There are two as long as ces resulting from this interaction – a as long as ce on the chair in addition to a as long as ce on your body. These two as long as ces are called action in addition to reaction as long as ces. Newtons 3rd Law in Nature Consider the propulsion of a fish through the water. A fish uses its fins to push water backwards. In turn, the water reacts by pushing the fish as long as wards, propelling the fish through the water. The size of the as long as ce on the water equals the size of the as long as ce on the fish; the direction of the as long as ce on the water (backwards) is opposite the direction of the as long as ce on the fish ( as long as wards).
3rd Law Flying gracefully through the air, birds depend on Newtons third law of motion. As the birds push down on the air with their wings, the air pushes their wings up in addition to gives them lift. Consider the flying motion of birds. A bird flies by use of its wings. The wings of a bird push air downwards. In turn, the air reacts by pushing the bird upwards. The size of the as long as ce on the air equals the size of the as long as ce on the bird; the direction of the as long as ce on the air (downwards) is opposite the direction of the as long as ce on the bird (upwards). Action-reaction as long as ce pairs make it possible as long as birds to fly.
Other examples of Newtons Third Law The baseball as long as ces the bat to the left (an action); the bat as long as ces the ball to the right (the reaction). 3rd Law Consider the motion of a car on the way to school. A car is equipped with wheels which spin backwards. As the wheels spin backwards, they grip the road in addition to push the road backwards. 3rd Law The reaction of a rocket is an application of the third law of motion. Various fuels are burned in the engine, producing hot gases. The hot gases push against the inside tube of the rocket in addition to escape out the bottom of the tube. As the gases move downward, the rocket moves in the opposite direction.
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