Modern Physics

# 10 examples of Newton’s second law in everyday life

In Newton’s second law , known as the Fundamental Principle of Dynamics, the scientist states that the greater the mass of an object, the more force will be needed to accelerate it. it is inversely proportional to the object.

We know that an object can only accelerate if there are forces on that object. Newton’s second law tells us exactly how much an object will accelerate for a given net force.

In other words, if the net force doubled, the object’s acceleration would be twice as great. Likewise, if the object’s mass were doubled, its acceleration would be halved.

## Examples of Newton’s Second Law in Real Life

Newton’s law applies to real life, being one of the laws of physics that most affects our daily lives:

### 1- kick a ball

When we kick a ball, we exert force in a specific direction, which is the direction in which it will travel.

Also, the harder the ball is kicked, the stronger the force we put on it and the farther it goes.

### 2- Take the ball with your hand

Professional athletes move their hands back when they catch the ball, as it gives them more time to slow down and, in turn, applies less force to the part.

### 3- Push a car

For example, pushing a shopping cart with twice the force produces twice the acceleration.

### 4- Push two cars

On the other hand, pushing two supermarket cars with the same force produces half the acceleration because it varies inversely.

### 5- Push the same car full or empty

It is easier to push an empty grocery cart than a full one, as a full cart has more mass than an empty one, so more force is needed to push the full cart.

### 6- Push a car

To calculate the force needed to push the car to the nearest gas station, assuming we move a one-ton car around 0.05 meters per second, we can estimate the force exerted on the car, which in this case will be about 100 Newtons

### 7- Driving a truck or car

The mass of a truck is much greater than that of a car, which means that it requires more force to accelerate to the same extent.

When, for example, a car is driven 100 km on a highway for 65 km, certainly less gasoline will be used than if someone had to drive at the same speed for the same distance in a truck.

### 8- Two people walking together

The same reasoning above can be applied to any moving object. For example, two people who walk together, but one of them has a lighter weight than the other, although they walk with the same amount of force, whoever weighs less goes faster because their acceleration is certainly greater.

### 9- Two people pushing a table

Imagine two people, one with greater force than the other, pushing a table in different directions.

The person with the greatest strength is pushing to the east, the person with the least strength to the north.

If we add the two forces together, we get a result equal to the table’s motion and acceleration. The table will therefore move in a northeasterly direction, albeit with a greater tilt to the east, given the force exerted by the strongest person.

### 10- Playing golf

In a golf game, the ball’s acceleration is directly proportional to the force applied to the club and inversely proportional to its mass. The force of the air influences the path which can cause a small change in your direction.

## Newton’s Laws

Isaac Newton (January 4, 1643 – March 31, 1727), English physicist and mathematician, famous for his law of gravitation, was a key figure in the 17th century scientific revolution and developed the principles of modern physics.

Considered the most influential book on physics and possibly all science, it contains information on almost every essential concept in physics.

This work offers an accurate quantitative description of moving bodies in three basic laws:

1 – A stationary body will remain immobile unless an external force is applied;

2- The force is equal to the mass multiplied by the acceleration and the change in movement is proportional to the applied force;

3- For every action, there is an equal and opposite reaction.

These three laws helped to explain not just elliptical planetary orbits but almost every other movement in the universe: how planets are held in orbit by the pull of the sun’s gravity, how the moon revolves around the Earth and Earth’s moons. Jupiter revolves around it and like comets revolve in elliptical orbits around the sun.

The way in which almost everything moves can be resolved using the laws of motion: how much force it will take to accelerate a train if a cannonball hits its target, how air and ocean currents move or if a plane will fly, are all applications of Newton’s second law.

In conclusion, it’s very easy to observe Newton’s second law in practice, if not mathematics, since we’ve all proven empirically that it takes more force (and therefore more energy) to move a grand piano that’s heavier than it does slide. a stool across the floor.

Or, as mentioned earlier, when a fast-moving cricket ball is caught, we know it will do less damage if you move your arm back while holding it.