Newton’s second law states that the acceleration of an object is directly proportional to the net force acting on an object and inversely proportional to the mass of an object. (i.e., an object’s acceleration increases with the increase of net force, and an object’s acceleration decreases with the increase in mass)
Here are some examples of newton’s second law in everyday life:
- #1 Pushing an empty trolley is easy than pushing a loaded trolley (a ∝ 1/m)
- #2 Lifting a small box is easy than lifting a heavy one (a ∝ 1/m)
- #3 Riding a single-seat bicycle is easy than riding a double seat bicycle (a ∝ 1/m)
- #4 Hitting a tennis ball with the bat is easy than hitting a football (a ∝ 1/m)
- #5 Pulling a 100 kg wagon is comfortable for 3-4 persons than one single person (a ∝ f)
- #6 Pulling a horse cart is comfortable for 3-4 horses than one single horse (a ∝ f)
- #7 Lifting a wardrobe is comfortable for 3-4 persons than one single person (a ∝ f)
- #8 Pushing a car is easy for 3-4 persons than one single person (a ∝ f)
Let’s one by one discuss the above examples in detail.
#1 Pushing an empty trolley is easy than pushing a loaded trolley (a ∝ 1/m)
Newton’s second law says that the acceleration of an object inversely depends upon its mass. For example, if you push an empty trolley with your hand, then (because of its less mass) it will move forward faster than a loaded trolley (whose mass is more).
#2 Lifting a small box is easy than lifting a heavy one (a ∝ 1/m)
Suppose that two persons (each having a courier box of a different mass in their hand) are accelerating on the road. Who do you think will accelerate more?
A person with a small courier box will accelerate more, and a person holding a large box will accelerate less. Because as per Newton’s second law, the acceleration of an object inversely depends upon its mass.
#3 Riding a single-seat bicycle is easy than riding a double seat bicycle (a ∝ 1/m)
It is easier to ride a single-seat bicycle than riding a double-seat cycle. Because according to Newton’s second law, the acceleration of an object inversely depends upon its mass.
In other words, the acceleration of a single-seat bicycle will be more as its mass is less, and the acceleration of a double seat bicycle will be less as its mass is more.
#4 Hitting a tennis ball with the bat is easy than hitting a football (a ∝ 1/m)
As per Newton’s second law, the acceleration of an object inversely depends upon its mass. Therefore, if you hit a tennis ball and a football with the bat, then a tennis ball (because of its less mass) will accelerate more, and a football (because of its more mass) will accelerate less.
#5 Pulling a 100 kg wagon is comfortable for 3-4 persons than one single person (a ∝ f)
If you alone try to push a 100 kg wagon with your hand, it will be difficult for you to move this wagon. But, it will be easy for 3-4 people to move this wagon together.
As per Newton’s second law, the acceleration of an object directly depends upon the net force applied to it. So, when one person alone pushes a 100 kg wagon, the net force acting on the wagon is less, so its acceleration will be less. But, when 3-4 persons together push a 100 kg wagon, the net force acting on the wagon is more, so its acceleration will be more.
#6 Pulling a horse cart is comfortable for 3-4 horses than one single horse (a ∝ f)
If one horse alone tries to pull a horse cart, it will be difficult for that horse to pull this horse cart. But, it will be easy for 3-4 horses to pull this horse cart together.
Newton’s second law states that the acceleration of an object directly depends upon the net force applied to it. So, when one horse alone pulls a horse cart, the net force acting on the horse cart is less, so its acceleration will be less. But, when 3-4 horses together pull a horse cart, the net force acting on the horse cart is more, so its acceleration will be more.
#7 Lifting a wardrobe is comfortable for 3-4 persons than one single person (a ∝ f)
It is easy for 3-4 persons to accelerate a wardrobe on the floor, but it is difficult for one person to accelerate a wardrobe alone on the floor.
According to the second law, the acceleration of an object directly depends upon the net force applied to it. When a single person accelerates a wardrobe, the net force acting on it is less, so its acceleration will be less. And when 3-4 persons accelerate it, the more net force acts on it, and so its acceleration will be more.
#8 Pushing a car is easy for 3-4 persons than one single person (a ∝ f)
When your car gets stuck in the sand, at that time, if you push it alone from the back, then do you think that it will accelerate forward? As per Newton’s second law, I think you’ll need more people.
The second law says that the acceleration of an object directly depends upon the net force applied to it. When a single person pushes a car, the net force acting on it is less, so its acceleration will be less. But when 3-4 persons join them, the net force acting on a car is more, so its acceleration will be more.
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