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Newtons Laws of Motion
The three laws proposed by Sir Isaac Newton to define the concept of a force and describe motion, used as the basis of classical mechanics.
1,508 Questions
Can a force of 3 newtons move a 1-kg mass 3 meters and a 3-kg mass one meter?
I think you're confusing force and work. Both are related, but they're not the same thing. Let's review a few things, first. If an object of mass, m, experiences an acceleration, a, then we know the sum of the forces acting on the object is m * a. In other words, F = ma. The unit of force is the newton (N). Note that distance (or displacement) does not factor in the equation. If an object experiences a force, F, and moves a distance, d, in the direction of the force, we know that the work done on the object is F * d. In other words, W =Fd. The unit of work is the newton-meter, which is known as a joule. Note that mass does not factor in the equation. So where the heck does this leave us? The answer to your question is yes to both parts. If the mass -- even a large one -- is resting on a frictionless surface, even the smallest force applied to it will cause it to accelerate in the direction of the force. For the numbers you provided, it will take no time for the 3-newton force to move either the 1-kg mass three meters or the 3-kg mass one meter. Let's keep exploring to see whether we can learn anything else from this problem. Since F = ma, we may write a = F/m, so the 1-kg mass accelerates at 3N/1kg = 3 meters per second squared. (Note this assumes a frictionless environment.) For the 3-kg mass, we have
a = 3N/3kg = 1 meter per second squared (m/s2). So, the larger mass doesn't accelerate as rapidly. How about the work done? In both cases, the force acting on the objects is 3 newtons. The work done to move the larger mass one meter is 3N * 1m = 3 joules. The work done to move the smaller mass is 3N * 3m = 9 joules. Keep in mind that in the presence of friction -- between the object and the surface it rests on, for example -- a 3-N force may not be enough to overcome the frictional forces working against it, especially for large masses or for surfaces with very high friction coefficients.
Kinetic energy is energy that is moving or in motion. Potential energy is energy that is still but has potential to move. Both energy's can switch back and forth from each other. Energy is never lost, it just changes forms. Hope this helps!
What is mechanical equilibrium?
Mechanical equilibrium occurs when the forces acting on an object are balanced, resulting in no net force on the object. This means the object will remain at rest or move at a constant velocity. It can be achieved by balancing forces in various directions.
What is another name for the second law of motion?
Another name for the second law of motion is the law of acceleration, as it describes how an object's acceleration is directly proportional to the force applied to it and inversely proportional to its mass.
Second Law of Motion: Acceleration is produced when a force acts on a mass. the greater the mass ( of the object being accelerated) the greater the amount of force needed ( to accelerate the object).
When the well water pump starts it drops to a very low pressure-volune before recapturing. Why?
This could happen if there is air trapped in the pump or water lines, leading to a temporary drop in pressure. It could also be due to a malfunction in the pump itself, such as a clog or blockage in the system. It's important to have the pump inspected to identify and address the root cause of the issue.
In Physics what does 32 ft per s per s actually mean?
Accelerating at a rate of (an additional) 32 feet per second, every second. So, for the first second, the object travels at 32 feet per second. A moment later, it's moving at 64 feet per second. By the time three seconds have elapsed, it's going 96 feet per second. At that point, round off to 100 feet per second, divided into 5200, and it's traveling about 1/50th of a mile in one second, or around 50 miles per hour (1/50th of a mile, times 60 seconds, is a little less than 1 mile in a minute, or just less than 60 MPH). Mighty fast. Look up "acceleration constant for falling objects"
As a point of interest there is a stage in which the falling object will not fall any faster than already stated above. This is called Terminal Velocity, when air resistance upon the object equals that of the force of gravity upon the object.
Robert
Is canoeing part of any newtons law of motion?
Yes, canoeing involves Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. When paddling a canoe, the force exerted by the paddler on the water (action) propels the canoe forward, while the water exerts an equal and opposite force on the canoe (reaction), allowing it to move through the water.
What is the net force of a 200-kg crate sitting at rest on a factory floor?
The net force acting on the crate is zero since it's at rest. According to Newton's First Law of Motion, an object will remain at rest unless acted upon by an external force.
(a= acceleration; Fnet= Net Force; m=mass)
Fnet=m*a
Net force is the sum of all forces acting on each other and it's unit's are expressed in Newtons=N
If two forces are going excatly oposite each other the two forces would be subtracted to find the Net Force. If the two forces are acting in the same direction the sum of the two forces would equall the Net Force.
Examples of Newtons first Law Of Motion?
- A book remains at rest on a table unless an external force is applied to move it.
- A ball rolling on a flat surface will continue rolling at a constant velocity unless acted upon by an external force.
- An astronaut floating in space will continue to float in a straight line unless propelled by a thruster.
- A car will continue moving forward unless a force, such as braking or friction, slows it down.
Does the inertial frame of reference idea work for constant velocity upward?
So the correct question should be "Does the 'inertial frame of reference' idea work for constant velocity upward?".
You are right when you say that, in this case, for scientists moving upward, getting far away from Earth, gravitation force gets weaker and weaker, and so the experiment they do gives different result from the same experiment done on the ground. The apparent paradox is solved if we analize the relativity principle better: it just says that the laws are the same, but does not tell anything about conditions. The laboratory on the ground has, as a condition, a constant filed (gravitation field, also called "acceleration of gravity", g = - GmE /rE2 ≈ 9.8 m/s2), whilst the laboratory moving upward has a different condition, that is, a decreasing field (g(t) = - GmE /(rE + vt)2): the laws are the same, but the conditions are not.
When we say that an experiment done in an inertial reference frame gives the same result of the experiment done in another inertial reference frame, we leave unsaid that there must be the same conditions (when you say "the same experiment", you mean "the same experiment and the same conditions"). In fact, as you noticed, if we restore a constant field in the laboratory moving upward, instead of a decreasing one, the conditions are the same, and the experiment gives the same result, preserving the validity of relativity principle and the idea of inertial reference frame.
The way you proposed to restore a constant field is not completely correct: a constant acceleration would be the perfect way only if the laboratory was very far from Earth (far from any massive body, actually): if it doesn't feel any gravitation force, then a constant acceleration of 9.8 m/s2 (that is about the value of g at the ground) would be equivalent to the situation on the Earth (and this perfect equivalence is the idea the general relativity is based on). But in our case, the laboratory moving upward is not free from the gravitation field generated by the Earth, and so the way to compensate and restore a constand field is more complex. I would say that, if we want to find what kind of motion of the laboratory would restore a constant field of the value - GmE /rE2 ≈ 9.8 m/s2, we should reason as follows.
Considering that the laboratory is moving along the radius direction (with origin in the center of mass of the Earth), we can use scalars instead of vectors. Given an unknown motion h(t), the acceleration is a(t) = d2h/dt2; knowing that the gravitation field is g(t) = - GmE /(rE + h(t))2, and since we want total acceleration to be equal to - GmE /rE2, it's
- GmE /rE2 = g(t) + a(t) →
→ - GmE /rE2 = - GmE /(rE + h(t))2 + d2h/dt2.
This should be the differential equation whose solution h = h(t) represents the equation of motion the laboratory must have in order to feel a constant field of the same value of the one felt by the laboratory on the ground.
I hope this explanation is clear. The important concept is that the idea of inertial reference frame is valid everywhere, if you consider the same conditions for the experiment (in other words, it simly states that the constant velocity a system may have does not affect the laws of physics; so much so that it has no sense to ask the velocity of a system without specifying the (inertial) reference frame relatively the whom you want to know the velocity).
How can you increase water pressure on an under the counter water filter system?
Install a booster pump. There are many pumps available on-line. Installing a booster pump to your RO filter system will both increase the quality of your filtered water and increase the amount of water your RO will make in a given time period.
Search RO booster pump on-line and you will locate many suppliers.
What does autrefois acquit mean in law?
Autrefois acquit is a legal term that means "previously acquitted" in French. It refers to a defense in criminal law where a defendant argues that they cannot be tried again for the same offense because they have already been acquitted or convicted of that crime in a previous trial.
Explain why the polygon of forces must close when a body is in equilibrium?
The answer is in the definition: polygon of forces(plural polygons of forces) # (mechanics) A polygonal figure the sides of which are vectors representing several forces acting simultaneously upon one point, so that the vector necessary to make the figure closed is the resultant of those forces.
What is Another name for newtons first law of motion?
Newton's first law of motion is also known as law of inertia.
Absolute velocity refers to the speed and direction of an object relative to a fixed point, regardless of any external factors. In the context of a free falling body with zero net force due to air resistance and gravity, its absolute velocity would be constant and equal to the velocity just before air resistance became negligible.
Newton's first law of motion, also known as the law of inertia. It states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity in a straight line unless acted upon by a net external force. This means that the object will not change its velocity unless there is a force pushing or pulling on it.
How can you increase the water pressure from a tank?
The only way to increase water pressure is with a booster pump. I would recommend talking to a plumber, he can give you an estimate and possibly some pointers. Also, home improvement shops tend to have poor pump selection so be sure to shop around from catalogs and the internet before buying anything.
the law gives rights to individuals and methods of enforcing those rights, Quite often law is involved in a balancing act, trying to ensure that one person's rights do not affect the other person's rights. in order to keep the balance the law also imposes duties on people
law is for each an individuals, who is forced to follow it. law is for the benifit of ones self as well as for the country or nation.
Is it impossible when an object moving in a straight line has no acceleration?
Yes, if an object is moving in a straight line and has no change in its speed or direction, then it has no acceleration. Acceleration is the rate of change of velocity, so if the velocity is constant, the acceleration is zero.
What are examples of Isaac Newton's First Law of motion?
Newton's first law of motion says that "Things in rest, stay in rest and things in motion, remain in motion with the same velocity, unless acted upon an unbalanced force." For example when you see someone standing still they are staying at rest
Unless you push them then they are in motion
Until they run into a pole or a person
What is the area of a 1500 N object that exerts a pressure of 500 Pa?
The area can be calculated using the formula: pressure = force / area, rearranging for area gives area = force / pressure. Plugging in the given values, we get area = 1500 N / 500 Pa = 3 square meters.
Why is it important to know if your reference point is moving?
Knowing if your reference point is moving is important because it affects our understanding of motion and helps us accurately describe and predict the motion of objects in relation to that reference point. It allows us to distinguish between the motion of the reference point and the motion of the object being observed. Additionally, understanding the motion of the reference point is crucial for correctly interpreting data and making informed decisions in fields such as physics, engineering, and navigation.
How fast will a 5 lb ball be going if dropped from 2000 feet?
A 5 lb ball dropped from 2000 feet will reach a speed of approximately 117 mph when it hits the ground, neglecting air resistance. This is calculated using the kinematic equation vf = √(vi^2 + 2aΔy), where vi is the initial velocity (0 ft/s), a is acceleration due to gravity (32 ft/s^2), and Δy is the height (2000 ft).
