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Newton's Laws

Question

What is the 2nd of Newton's laws?

2 years ago

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55 Replies

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M

Misty Cronin


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55 Answers

James L Profile Picture
James L Verified Sherpa Tutor ✓

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Newton's second law states that Net Force acting on an object is directly proportional to its acceleration. In mathematical terms

F= ma

where F = net force acting on the object

m = mass of the object

a = acceleration

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H
Humair Hussain

the rate change of momentum is directly proportional to force

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Tim Nash

A force applied to an object equals a change in momentum (mass x velocity)

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Luca Parisi

Newton's second law states that the force acting on an object is equal to the mass of that object multiplied by its acceleration. Mathematically, it can be expressed as F = m*a, where F represents the force, m is the mass of the object, and a is its acceleration. 

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G
Georgia Panagi

Newton’s Second Law, also known as the Law of Motion, explains how a force affects the motion of a body. It states that the rate of change of a body's momentum is directly proportional to the force applied, and this change occurs in both magnitude and direction.


In equation form: F = ma, where F is the force, m is the mass, and a is the acceleration.


For example, when a car accelerates, the force applied by the engine results in a change in its momentum, with the rate of acceleration directly proportional to the force exerted (F = ma).

In equilibrium, the sum of forces acting on a body is zero. But when the car isn’t in equilibrium—like when it’s moving uphill—the sum of forces equals the rate of change of its momentum.


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Kieran Profile Picture
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Force is equal to the rate of change of momentum. F = dp/dt, where F = force, p = momentum and t = time. dp/dt is the first order derivative of momentum with respect to time. In cases where mass remains constant throughout the motion, F = dp/dt can be simplified to F = ma, where m = mass and a = acceleration, this is because p = mv, where v = velocity, and a = dv/dt, so making these substitutions:

F = dp/dt

= m dv/dt

= ma

Note that this simplification only applies when mass remains constant.

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D
Darcy Peake

Force is equal to mass multiplied by acceleration:


F = ma

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Mohammad Mahin

Newtons Second law is f = ma, which is the force = mass x Acceleration , Force (Newtons) = Mass (kg) x Acceleration (Metres/ Second)

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Oscar Fry

The resultant force acting on an object is proportional to the rate of change of momentum for that object. It also means that F=ma so a resultant force on an object will cause it to accelerate.

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Harry L Profile Picture
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Newton's second law states that the force acting on an object is directly proportional to the acceleration that object feels, mathematically defined as F=ma.

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Paul A Profile Picture
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Newton’s second law states that the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object. The acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body.

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The resultant force is the product of the mass and the acceleration.

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Lauren

Resultant force = mass x acceleration (F = m * a) - the change of momentum is directly proportional to the force.

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James H Profile Picture
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Rate of change of momentum is directly proportional to the resultant force, and in the same direction.

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Sofia Earally

resultant force= mass x acceleration


The acceleration of an object is proportional to the resultant force on it and inversely proportional to the objects mass.


Which means:


An objects acceleration is directly proportional to the resultant force acting on it. The object accelerates as a result of the resultant force. If the resultant force is bigger that means it will accelerate more.


An objects acceleration is also dependent on its mass but its inversely proportional which means the larger the mass the smaller the acceleration.

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