CLASS 10TH DAY 8
INTRODUCTION
Newton’s law of motion in everyday life:
Newton’s laws of motion describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. The first law of motion defines the force qualitatively, the second law offers a quantitative measure of the force, and the third asserts that a single isolated force doesn’t exist. These three laws have been expressed in several ways, over nearly three centuries and can be summarised as follows:
The first law of motion:
In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force.
In the video tutorial, we have seen the example of car suddenly applying brakes leading to the educator moving forward, this can be explained by Newton’s first law as the person was initially in motion and when brakes were suddenly applied, his body moved forward because the body was in interia of motion and was supposed to remain so because of Newton’s first law.
The second law of motion: In an inertial frame of reference, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration a of the object: F = ma. (It is assumed here that the mass m is constant – see below.)
Example: In the video, the educator shows us the example where the ball hits him harder when he takes the catch in the wrong way, have you understood why it is so? It is clearly because of newton’s second law. This law teaches us that Force applied on a body is equal to mass x acceleration and retardation (negative acceleration) here is obviously more when you take the catch in proper manner giving time to the ball to slow down velocity to zero.
The third law of motion:
When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
Example: In the video, we have seen the example of how a rocket moves. It is with the use of Newton’s third law, Rocket propels gases at a very high rate, leading to the rocket accelerating upward by equal force in opposite direction.
How Asia Got Its Name?
Asia is Earth’s largest and most populous continent, located primarily in the Eastern and Northern Hemispheres. It shares the continental landmass of Eurasia with the continent of Europe and the continental landmass of Afro-Eurasia with both Europe and Africa. Asia covers an area of 44,579,000 square kilometres (17,212,000 sq mi), about 30% of Earth’s total land area and 8.7% of the Earth’s total surface area. The continent, which has long been home to the majority of the human population,was the site of many of the first civilizations.
Asia is notable for not only its overall large size and population, but also dense and large settlements, as well as vast barely populated regions. Its 4.5 billion people (as of June 2019) constitute roughly 60% of the world’s population.
But do you know how it got its name lets find out.👇 👇
What happens when we divide a number by zero?
We have always assumed that any number divided by zero is not defined. Here, through this video we would like students to know why it is so. Everything in mathematics has a relational understanding and holds relevance. Why tan 90 is not defined, what’s the real difference between infinity and not defined. What actually happens when we multiply any two numbers. Why 2 x 5 = 5 x 2 but 2 / 5 is not equal to 5 / 2.
Ramanujan Constant
Ramanujan was one of the most brilliant Indian mathematician .he could play with numbers easily but do you know there is a number which he found really interesting lets find out.👇 👇
1729 was the smallest number that could be expressed by the sum of two cubes in two different ways. This story is very famous among mathematicians. 1729 is sometimes called the “Hardy-Ramanujan number”
Coronavirus and the graph
Stay informed. Stay cautious, but not scared. Listen to scientists and public health officials and follow their guidance. By protecting yourself, you’re protecting the most vulnerable among us.
JIVAN GYAN
Today we will learn about 5-6 Yoga poses which will help boost your memory. Practice these daily and that will help you brush up your memory power and it also gives power to your brain. Click on learn more to watch the video explaining the same.
