Newton's Second Law Formula Explained
Newton's second law of motion describes the relationship between the force applied to an object, the object's mass, and its acceleration.
The Equation
The fundamental equation representing Newton's second law is:
$F = ma$
Variable Definitions
- $F$ represents the net force acting on the object (measured in Newtons, N).
- $m$ represents the mass of the object (measured in kilograms, kg).
- $a$ represents the acceleration of the object (measured in meters per second squared, m/s2).
This equation states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Analysis of Options
Let's examine the given options:
- $F = mc^2$: This is Einstein's famous equation relating energy (E) and mass (m), not Newton's second law.
- $F = AP$: This is not a standard physics equation representing Newton's second law.
- $F = ma$: This accurately represents Newton's second law of motion.
- $F = \frac{1}{2}mv^2$: This equation represents kinetic energy (KE), not the force described in Newton's second law.
Therefore, the correct equation for Newton's second law of motion is $F = ma$.
Similar Questions
- The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force. This rule is known as:
- A constant force acts on an object of mass $10\text{ kg}$ for a duration of $2\text{ seconds}$. It increases the object's velocity from $5\text{ metres/second}$ to $10\text{ metres/second}$. Find the magnitude of the applied force. Now, if the force is applied for a duration of $5\text{ seconds}$, what would be the final velocity of the object?
- What will happen to a person's weight when he is in a moving elevator?
What will be the resultant force if a body of mass 10 kg is moving with an acceleration of 5 m/sec2?
Action and reaction forces are exerted on which bodies during an interaction?
Important Questions from Laws of Motion
Which one of the following is an example of Second Class Lever?
A uniform meter scale of mass 0.24 kg is made of steel. It is kept on two wedges, W1 and W2 , in a horizontal position. W1 is at a distance of 0.2 m from one of its ends, while W2 is at distance of 0.4 m from the other end. If the force on the scale is N1 due to W1 and N2 due to W2, then : (take g =10·0 m s-2
Consider a journey by a car represented by the graph given below in three parts A, B and C. The speed of the car in these parts is Va, Vb and Vc, respectively:
Which one of the following is correct in this case?
Rocket works on the principle of:
A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is:
