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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

A block accelerates at 3.2 down a plane inclined at an angle 30 degrees. Acceleration of gravity is 9.8. Whats the coefficient of static friction between the block and the inclined plane?

Static friction does not apply when the block is already moving. Without friction, the force on the block parallel to the surface of the incline is Fg*sin(angle), so the acceleration without friction is 9.8* sin(30) = 9.8 * (1/2) = 4.9

Since it is accelerating at 3.2, friction is slowing down the block by (4.9-3.2 = 1.7). The coefficient of kinetic friction is (1.7/4.9) = 0.346939

What is it that its units are newtons per meters?

The units newtons per meter refer to the quantity known as a spring constant, which represents the stiffness of a spring. It describes how much force is needed to stretch or compress the spring by a certain distance.

Will knots help in the absence of friction?

No, knots rely on friction to hold them in place, so without friction, knots wouldn't be effective in securing items.

What force must be overcome to remove an electron?

The force that must be overcome to remove an electron from an atom is the electrostatic attraction between the electron and the positively charged nucleus. This force is governed by Coulomb's law and is known as the ionization energy. The amount of energy required to remove an electron depends on the specific atom and its electron configuration.

What force is needed to slide a wooden block having a mass of 300 slugs moving across a floor if the friction is 0.80?

The force needed to slide the wooden block can be calculated using the formula: force = friction coefficient * mass * gravity. Given that the mass is 300 slugs and the friction coefficient is 0.80, the force required will be 2400 lbs.

Why is the idea of absolute motion or rest misleading?

The idea of absolute motion or rest is misleading because motion is always relative to other objects. There is no universal reference point that determines absolute motion or rest. This concept is further supported by Albert Einstein's theory of relativity, which states that there is no absolute frame of reference in the universe.

What if your walking down the street describe the forces acting on you and use Newton's laws of motion to describe your motion?

When walking down the street, the two main forces acting on you are gravity pulling you down towards the Earth and the normal force from the ground pushing you up. According to Newton's first law of motion, if the forces are balanced (in this case, gravity and the normal force), you will continue moving at a constant velocity in a straight line. If you want to change your motion (speed up, slow down, change direction), you would need to apply an additional force in the direction you want to move.

What one thing on earth makes newtons first law not seem to be true?

Friction is one thing on Earth that can make Newton's first law seem not to be true, as it can act as a force that opposes motion and can cause objects to stop rather than continue in a state of constant velocity.

How does newtons laws of motion apply to volcanoes?

Newton's laws of motion can be applied to volcanoes in various ways. For example, the first law states that an object at rest will remain at rest unless acted upon by an external force, which can be seen in the build-up of pressure within a volcano before an eruption. The second law relates to the acceleration of magma as it moves towards the surface during an eruption. The third law can be observed in the equal and opposite forces created during volcanic explosions.

What newtons law explains why a ball bounces?

when a ball is dropped it hits the floor and the ball is flattened. That creates energy. The only way the ball can release the energy is bouncing back up. But the ball starts to lose its height and the ball eventually loses its energy and comes to a stop.

What do it means when they say balanced forces?

When forces are balanced, the total force acting on an object is zero, resulting in no change in the object's motion. This means that the forces acting in opposite directions cancel each other out. As a result, the object either remains at rest or continues to move at a constant velocity.

Who was the Athenian councilor to first codify the law of Athens?

The Athenian councilor who is credited with first codifying the law of Athens is Draco. Draco was known for his harsh legal code, which was later replaced by Solon's more moderate laws.

What will be the ratio of the velocities if two objects of masses M and m having same size are dropped simultaneously from heights H and h?

The mass shouldn't make any difference in an ideal system.

Using v^2=u^2+2as for each object, you get v=sqrt(2gH) and sqrt(2gh) for the two objects. The ratio will simplify to sqrt(H/h).

Why do action reaction forces never cancel each other?

Because they are acting on different objects.
The action and reaction forces - in the sense of Newton's Third Law - act on different objects. In some everyday situations, such as a book lying on a table, pressing down on the table, and the table pressing up on the book, these forces are balanced by additional forces, in other cases, they are not.
Please note that "action" and "reaction" forces (from Newton's Third Law) act on different objects. Only forces acting on the same object may cancel out (for purposes of Newton's Second Law), if their vector sum happens to be zero.

How is the center of the gravity determined when an object is at rest or in motion?

If the object is a thin lamina with uniform thickness (e.g. a piece of paper), the the centre of gravity of the object is at its geometrical centre. It can be determined by suspending a load (e.g. pendulum) on an edge of the lamina twice and the point where the plumb lines intersect is the centre of gravity.

What is the force of a vehicle traveling 40 mph and hitting a stationary object?

I'm pretty sure that's going to depend on the vehicle's mass. I'm sitting here

performing a gedanken experiment right now, with a house fly and a Mercedes

both hitting the same brick wall.

How do you calculate the force required to pull a 5 ton 5000kg x 9.81 equals 49050 N pipe along 10 sets of idle pipe conveyor systems i assume it is less than the total normal force?

To calculate the force required to pull the 5000kg pipe along the 10 sets of idle pipe conveyor systems, you need to consider the frictional force acting against the movement of the pipe. This frictional force will depend on the coefficient of friction between the pipe and the conveyor systems. You can use the formula F_friction = coefficient of friction * Normal force to calculate the force required. The force needed to overcome this frictional force should be less than the total normal force acting on the pipe.

If you were standing in an enclosed car moving at constant velocity would you have to lean in some special way to compensate for the car's motion?

No, if the car is moving at a constant velocity, there is no need to lean in any special way to compensate for its motion. Your body is also moving at the same constant velocity as the car, so you will not feel any effect of the motion.

When does one feel the effects of velocity in a moving vehicle when it is moving uniformly or when its motion changes?

One feels the effects of velocity in a moving vehicle when its motion changes, such as when the vehicle accelerates, decelerates, or changes direction. When a vehicle is moving uniformly, there are no noticeable changes in speed or direction, so the effects of velocity are not as perceptible.

Why ball is in the law of inertia?

The ball remains at rest or in motion with a constant velocity unless acted upon by an external force. This is known as Newton's first law of motion, which is a fundamental principle in the law of inertia.

What can proceed in the opposite direction?

Traffic, a conveyor belt, a river current, and a moving walkway can proceed in the opposite direction.

What is the magnitude of net force acting on a drop of rain falling down with a constant speed?

consider a sphere moving through a viscous medium the fluid layer in contact with the sphere is moving with same velocity but the layer far away is at rest. This makes a relative motion to be setup.viscous force acts on this drop.The backward force is proportional to the speed of the drop.at a stage the viscous force balances the downward force.hence the body moves with a constant velocity called terminal velocity.

What are the fire pit laws in chelmsford ma?

In Chelmsford, MA, outdoor recreational fires are allowed as long as they comply with the town's regulations. These include having a permit for larger fires, keeping fires contained, using only clean, dry firewood, and ensuring that the fire is supervised at all times. It's recommended to check with the local fire department or town officials for specific information on fire pit laws in Chelmsford.

Which of Newton's Laws describes that a large massive body requires a large force to change speed quickly?

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Therefore, a large massive body requires a larger force to change speed quickly because its mass increases the inertia that opposes the change in speed.