newton law name with full explaination
Answers
Answer:
Inertia, Force = Mass x Acceleration, “For every action, there’s an equal, but opposite reaction.”
Explanation:
1. Inertia (FN + Fg + Fa = 0)
Newton’s first law of motion is inertia. – “An object in motion tends to stay in motion, and an object at rest tends to stay at rest, unless the object is acted upon by an outside force.”
For example, say there are two balls with the same size. However, one is an inflatable beach ball, and the other is a bowling ball. The bowling ball would be harder to move and harder to stop once it is moving – it has more inertia due to more mass.
2. Force = Mass x Acceleration (FN = ma)
Newton’s second law of motion is the equation, Force = Mass x Acceleration. – “Net force is equal to mass times acceleration.”
For example, say you have a hockey puck and a friction-less ice rink. When you push the puck along with the stick, that is a force, that is not being cancelled out by anything else. Therefore, the puck would be experiencing acceleration. When the puck is moving across the ice or staying still, all the forces are balanced out. This is called equilibrium. The velocity of an object that is in equilibrium, would not be changing.
3. “For every action, there’s an equal, but opposite reaction.” (FN = -Fg, or Fg = -FN)
Newton’s third of motion is that if you exert a force on an object, it exerts an equal force back on you (this force is known as the normal* force). – “For every action, there’s an equal, but opposite reaction.”
*In this context, ‘normal’ means perpendicular.
The normal force is always perpendicular to the surface the object is resting on. If you place a book down on a table, the normal force is pointing up. However, if the same book is placed on a ramp, the normal force is pointing perpendicular to the ramp. Say you have a piece of aluminium foil, stretched tightly across the top of a bowl, and you place one bead on top of it. Due to gravity, the bead will exert a force (Fg, g = gravity) onto the foil. And the normal force (FN, n = net) will push back with the same amount. Then you add another bead, which will double the force it was exerting before, therefore will double the normal force as a result. This normal force will keep on increasing until you have placed enough beads to push the foil into the bowl. This is the result of when the normal force is not able to match the force pushing against it.
There are three of Newton’s laws of motion. In these three laws of motion, he explained the relationship between forces acting on the body and the motion of the body. Newton’s three laws are as stated below:
An object continues to be under the state of uniform motion unless an external force acts on it.
Force is a product of mass and acceleration.
For every action, there is an equal and opposite reaction.
Newton’s first law of motion is also known as the law of inertia. In Newton’s second law of motion, the velocity is constant. Newton’s third law of motion is also known as conservation of momentum.
Newton’s Law of Motion
Sir Isaac Newton was an English mathematician, astronomer and physicist who gave three laws which proved to be fundamental laws for describing the motion of a body. These are generally known as Newton’s laws of motion. We will discuss each law of motion one by one in detail.
Newton’s First Law of Motion:
Newton’s first law of motion states that “A body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it”. Suppose a block is kept on the floor, it will remain at rest until we apply some external force to it. Also, we know that it takes us more effort or force to move a heavy mass. This is directly related to a property known as Inertia. This law is also known as the law of inertia.
Newton’s Second Law of Motion:
The first law has already given us a qualitative definition of force. Now we are interested in finding out its magnitude. According to Newton’s second law of motion, the net force experienced by a body is directly proportional to the rate of change of momentum of the body. It can be written as:
f∝
dP
dt
⇒f∝
mv−mu
t
⇒f∝
m(v−u)
t
⇒f∝ma
⇒f=kma
Where k is the constant of proportionality and it comes out to be 1 when the values are taken in SI unit. Hence the final expression will be,
F = ma
Newton’s Third Law of Motion:
According to Newton’s third law of motion, for every action, there is an equal and opposite reaction. Forces are always found in pairs. For instance, when you sit on a chair, your body exerts a force downward and that chair needs to exert an equal force upward or else the chair will collapse.
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