The Book Physics Part 2 is for Intermediate FSC & ICS 2nd year. This is a book by Punjab Curriculum and Textbook Board, Lahore and published by Seith Adam Jee Abdullah, Lahore, download free book here.
The authors of the book are
- Prof. Dr. Mrs. Fouzia Saleemi
- Prof. Dr. M. Zakria Butt
- Prof. Muhammad Ali Shahid
- Prof. Sh. Aftab Ahmed (Rtd.)
- Prof. Naseeer Ahmad Qureshi (Rtd.)
- Prof. S. M. Akhtar (Rtd)
- Prof. Dr. Muhammad Rafiq
- Dr. Muhammad Rafiq Sahi (Rtd.)
- Prof. Muhammad Nawaz Khan
We’re living within the century of science and technology and the advent of science each day has transformed our lives. When people had no idea approximately science, even then their lives were ruled by way of standards of different branches of science.
while we mild a hearth, it is a chemical system; whilst we eat and digest meals, it’s miles organic technique; when we walk on Erath, it’s miles governed by way of legal guidelines of physics; when an earthquake occurs, it’s a seismic pastime; while we speak approximately exclusive terrains and gemstones of Earth surface, it is associated with Geology.
There may be no unmarried hobby of our lives, which outlines our one or other field of technology. In addition, physics governs our ordinary lives and is worried in some of the activities we carry out and matters we use in our day-by-day existence.
Here we will talk about how physics is gambling its component in strolling our regular responsibilities and assists us to do our errands, chores, and obligations easily and correctly.
Body frame
Physics is taken into consideration herbal science because it offers things as rely on, force, electricity, and movement.
As these all are associated with task-related to ordinary existence, so, we can say that physics research how the universe works, how Earth moves across the solar, how lightning moves, how our fridge works, and plenty of greater. In short, physics defines how the whole lot works around us.
When can’t separate something from science and, our world cannot disconnect itself from the wonders of Physics? Whilst we look around us, we are able to see a range of factors that work on the concepts of Physics.
We can explain our numerous sports by using utilizing the know-how of Physics. Here, we will discuss some of the examples, if you want to help us to learn the way physics is gambling its component in our lives every day.
Taking walks
A number of ideas of physics are involved in the simple act of walking. It involves standards of weight, Newton’s three laws of inertia, friction, gravitational law and ability, and kinetic energy.
When we stroll, we virtually act like an inverted pendulum. When we positioned the foot on the floor, it turns into our axis and our mass is targeted in our stomach, describing the form of an arc. while we set foot on the floor, we surely put weight i.e. w=mg, and apply backward pressure on the ground, because the reaction to our weight, the floor responds through an opposing force that’s vertical in nature, on the leg which slows us down and this slowing process keeps unless our leg comes nearest to our tummy.
Whilst the leg is moving, kinetic strength is at maximum and capacity power is zero, but, while the leg reaches nearest to belly or arc, potential power reaches its most. When every other step is taken, the saved ability strength is converted to kinetic power and this process continues.
We act as less than an excellent pendulum, due to the fact all ability energy isn’t converted into kinetic energy. The handiest sixty-five percentage of electricity is provided via saved capability strength to take the next step, last 35 percent is provided via biochemical strategies.
While we walk we virtually do some paintings in bodily terms, as W=F*S, whilst we exert some pressure and as a result of it we cover far we virtually do work. All through taking walks, Newton’s three legal guidelines of motion are implemented.
The first regulation of motion states that, a frame remains in the nation of relaxation except a pressure is applied on it. When we’re at rest, inertia is at maximum. The body needs the biggest amount of pressure to get out of a nation of inertia, i.e. whilst we start on foot.
While we communicate the first step the energy is transferred from the foot to higher frame parts and we begin moving, in the course of the process of on foot inertia continues on changing increases while we set foot on the ground and reduces when we circulate the foot up.
the second law of motion states that a=F/m i.e. acceleration is immediately proportional to the pressure we use or exert while taking walks, consequently, whilst we are able to follow greater pressure, our acceleration will increase.
1/3 law of motion is set movement and reaction when we set foot on the floor we exert force on it and as a result, to it, floor exerts a reactionary vertical force on the body.