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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

Why is it effective to have an applied force aimed directly at the object's center of mass?

Applying a force at an object's center of mass minimizes rotation and reduces the chances of tipping the object over. This makes it easier to control and move the object in a desired direction, as the force is directly influencing the object's overall motion without causing unnecessary rotation.

What is the known variable for net force?

The known variable for net force is "F_net." It represents the sum of all forces acting on an object in a particular direction.

What are forces that can act on an object without touching it?

Force of gravity and natural force act on an object without touching it.

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Besides gravity, magnetism, and radiation, such as infrared light.

What kind of mathematical relationship exists between velocity and distance?

Velocity is the rate of change of distance over time. This relationship is described by the equation velocity = distance/time, where velocity is measured in units like meters per second, distance is measured in units like meters, and time is measured in units like seconds. As velocity increases, the distance covered in a given amount of time also increases.

How does the potential energy of an activated complex compare with potential energies of the reactants and products?

The potential energy of the activated complex is higher than that of both the reactants and products. This energy barrier represents the minimum energy required for the reaction to occur. The activated complex is a transient state that exists at the peak of the reaction pathway.

What friction force acts between a refrigerator and the floor when the fridge is pushed?

The friction force between the refrigerator and the floor depends on the coefficient of friction between the two surfaces and the force applied to push the fridge. The friction force will act opposite to the direction of motion to prevent the fridge from sliding. It is essential to overcome this friction force to move the refrigerator.

What is the acceleration of a 10 kg rock that is pulled with a net force of 80N?

The acceleration of the rock can be calculated using Newton's second law, which states that acceleration is equal to the net force divided by the mass of the object. In this case, the acceleration of the 10 kg rock pulled with a net force of 80N would be 8 m/s^2.

Inside a freely-falling elevator would there be no apparent weight for you?

Yes, inside a freely-falling elevator, you would experience apparent weightlessness. This is because the elevator and everything inside it, including you, would be falling at the same rate due to gravity, creating the sensation of weightlessness.

Answers for True or False Viscosity is the tendency of a fluid to resist flow Both gases and liquids can display viscosity?

True. Viscosity is indeed the tendency of a fluid to resist flow. Both gases and liquids can exhibit viscosity, with liquids typically displaying more noticeable viscosity compared to gases due to the closer proximity of their particles.

What is velocity if the net force is 0?

If the net force acting on an object is 0, then the object will move with a constant velocity. This means that the object will neither speed up nor slow down, but continue to move at a consistent speed in a straight line. This is described by Newton's first law of motion.

Who has discovered equation of motion?

The equation of motion was originally discovered by Sir Isaac Newton in his laws of motion. These laws describe the relationship between the motion of an object and the forces acting on it.

How do gloves protect the brain of the boxer from injury?

Gloves protect the brain of a boxer from injury by cushioning the impact of punches, reducing the force transmitted to the head. This helps decrease the risk of brain trauma and injury during a boxing match. However, it's important to note that boxing still carries inherent risks, and proper technique and protective gear are crucial in minimizing these risks.

Is it theory or law if the body in motion stays in motion unless acted upon force?

That statement is a principle known as Newton's first law of motion, which is a fundamental law of physics. It describes the behavior of objects in motion and is supported by empirical evidence and widely accepted by the scientific community.

What is absolute rest and absolute motion?

motion :

when a body is moving or changing its position with respect to its surroundings is called motion.

rest:

when a body is not moving or fixed at a place with respect to its surroundings is called rest.

Would rolling friction reduce the net force of an object to zero?

Only if the object does not MOVE. If it moves in any direction, then the NET Force on the Object is NOT ZERO, it is equal to the (Applied Force) - (Friction Force).

So the answer to your question is FALSE.

Do action and reaction forces cancel out each other?

Yes and no. They are equal in size and opposite in direction, but they are NOT exerted onto the same object. Each object exerts exactly one force and each object RECEIVES exactly one force. With only one force being exerted onto each object, there is nothing to be cancelled on each single object. Thus, they do not cancel, they simply exert themselves on different objects.

How does mass and inertia avoid accidents?

Mass and inertia contribute to an object's resistance to changes in motion. In the context of accidents, vehicles with greater mass and inertia may require more force to accelerate, decelerate, or change direction, making them less likely to be involved in collisions. The inertia of an object also influences its tendency to stay in motion, which can help prevent sudden stops or changes in direction that may lead to accidents.

How does a zero net force affect an object's motion?

If an object experiences a zero net force, it will either remain at rest or continue moving at a constant velocity in a straight line according to Newton's first law of motion. This means the object's motion will not change unless acted upon by an external force.

What may happen when an object receives balanced forces?

When an object experiences balanced forces, it remains at rest or continues moving at a constant velocity. This is because the forces acting on the object cancel each other out, resulting in no acceleration.

Why must designers and engineers calculate forces acting on bodies and structures?

Designers and engineers calculate forces to ensure that structures and bodies can support the loads they will be subjected to. This helps in determining the material requirements and design options to ensure safety and structural integrity. Calculating forces also helps in avoiding failure and optimizing performance of the designed system.

What is newtons first law of motion summarized?

Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by an external force. This is also known as the law of inertia.

What type of flight can Newton's First Law best explain-explain your answer?

Newton's First Law best explains why an object at rest stays at rest or an object in motion stays in motion at a constant velocity unless acted upon by an external force. This principle is commonly used to explain the motion of airplanes in straight and level flight, as they maintain their speed and direction unless a pilot or external force changes their trajectory.

What is the effect of less friction on an object?

Less friction on an object results in smoother and faster movement. It reduces the force needed to overcome resistance, allowing the object to move more efficiently and with less energy loss due to heat or wear.

Does newtons second law state that if an unbalanced force acts on an object it will move at constant velocity?

No, 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 (F = ma). If there is an unbalanced force acting on an object, it will accelerate, not move at a constant velocity.

Does escape velocity depend upon height from which it is projected?

Yes, it would. That's one reason why some artificial satellites were tossed into

orbit after being carried up aboard the space shuttle.

The reason is because escape velocity from Earth depends on Earth's gravity,

which in turn depends on the distance from the Earth's center. The higher you

go, the farther you are from the center of the planet, the less gravitational

force there is between you and the Earth, and the smaller the escape velocity

thus becomes.

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