Ch-06: Work & Energy

Ch-06: Work & Energy 

After studying this unit, the students will be able to:

• Define work and its SI unit.
• Calculate word done using equation: Work = force x distance moved in the direction of force
• Define energy, kinetic energy and potential energy. State unit of energy.
• List the different forms of energy with examples.
• Describe the processes by which energy is converted from one form to another.
• State mass energy equation E-mc2 and solve problems using it.
• Describe the process of electricity generation by drawing a block diagram of the process from fossil fuel input to electricity output.
• List the environmental issues associated with power generation.

Ch-05: Gravitation

Ch-05: Gravitation

After studying this unit, the students will be able to:

• State Newton's law of gravitation.
• Explain that the gravitational forces are consistent with Newton's third law.
• Explain gravitational field as an example of field of force.
• Define weight (as the force on an object due to gravitational field).
• Calculate the mass of Earth by using law of gravitation.
• Solve problems using Newton's of gravitation.

Ch-04: Turning Effects of Force

Ch-04: Turning Effects of Force 

After studying this unit, the students will be able to:

• Define like and unlike parallel forces.
• State head to tail rule of vector addition of forces / vectors.
• Describe how a force is resoved into its perpendicular components.
• Determine the magintude and direction of a force from its perpendicular components.
• Define moment of force or torque as moment = force x perpendicular distance from pivot to the line of action of force.
• Explain the turning effect of force by relating it to everyday life. - State the principle of moments.
• Define the centre of mass and centre of gravity of a body.
• Define couple as a pair of forces tending to produce rotation.
• Prove that the couple has the same moments about all points.

Ch-03: Dynamics

Ch-03: Dynamics

After studying this unit, the students will be able to:

• Define momentum, force, inertia, friction and centripetal force.
• Solve problems using the equation Force = change in momentum / change in time.
• Explain the concept of force by practical examples of daily life.
• State Newton's laws of motion.
• Distinguish between mass and weight and solve problems using F=ma, and w=mg.
• Calculate tension and acceleration in a string during motion of bodies connected by the string and passing over frictionless pulley using second law of motion.
• State the law of conversation of momentum.
• Use the principle of conservation of momentum in the collision of two objects.

Ch-02: Kinematics

Ch-02: Kinematics

After studying this unit, the students will be able to:

• Describe using examples how objects can be at rest and in motion simultaneously.
• Identify different types of motion i.e translatory (linear random and circular); rotatory and vibratory motions and distinguish among them.
• Differentiate with examples between distance and displacement, speed and velocity.
• Differentiate with examples between scalar and vector quantities.
• Represent vector quantities by drawing.
• Define the terms speed, velocity and acceleration.
• Plot and interpret distance-time graph and speed-time graph.
• Determine and interpret the slope of distance-time and speed-time graph.

Ch-01: Physical Quantities and Measurements

Ch-01: Physical Quantities and Measurements

After studying this unit, the students will be able to:

• Describe the crucial role of Physics in Science, Technology and society.
• Explain with examples the Science is based on physical quantities which consist of numerical magnitude and a unit.
• Differentiate between base and derived physical quantities.
• List the seven units of System International (SI) alongwith their symbols and physical quantities (standard definitions of SI units are not required).
• Interconvert the prefixes and their symbols to indicate multiple and sub-multiples for both base and derived units.

Physics Symbols

What is the Importance of Physics Symbols?

In Physics, different symbols or documentations are utilized to mean various amounts. The indications make the portrayal of the amounts simpler. In this page, probably the most well known physics symbols are referenced. Let us assume that a lady drives her car at a speed of 30 kmph and reaches her hometown in 2 hrs and if she drives at 50 kmph, she reaches in 1.5 hr. So, if we have to represent these units as symbols, how can we do that?

Symbols used for physical quantities are vastly different. Sometimes, the symbol may be the first letter of the physical quantities they represent, like ‘d’, which stands for distance. Other times, they may be completely unrelated to the name of the physical quantities, such as c symbolises the speed of light.

Ch-12: Geometrical Optics

Chapter-12: Geometrical Optics 

Here this post contains Short Question and Answers of Chapter 12: "Geometrical Optics". Learn these question answers and other related stuff for exam preparation. 

Geometrical optics is a branch of optics where light is described by rays. Light rays are conceived as geometrical lines originating from sources, extending through media, and being revealed by detectors; their directions account for paths along which light flows.

Ch-11: Sound

Ch-11: Sound 

Here this post contains Short Question and Answers of Chapter 11: "Sound". Learn these question answers and other related stuff for exam preparation. 

A sound is a type of energy, very much like power, intensity or light. Sound is one of the significant feelings of the human body. A few sounds are wonderful, and some are irritating. We are exposed to different kinds of sound all time. Sound is a vibration that spreads as an acoustic wave, through a transmission medium

Ch-10: Simple Harmonic Motion and Waves

Ch-10: Simple Harmonic Motion and Waves

Here this post contains Short Question and Answers of Chapter 10 - Physics "Simple Harmonic Motion and Waves". Learn these question answers and other related stuff for exam preparation.

Simple Harmonic Motion or SHM can be defined as a motion in which the restoring force is directly proportional to the displacement of the body from its mean position. Understand SHM along with its types, equations and more.

Benefits of Technology

Benefits of Technology

Technology is the application of scientific knowledge for practical purposes, especially in industry. Nowadays, technology is important for us as we are live in a globalization. Everyone use any technology to make their life easier. Thus, many engineers try hard to produce a new brand and high quality machines and tools. As we can see, kids, teenagers, and adults spend their time with technology. We depend too much with it as technology is our soul. We use technology to accomplish various tasks in our daily lives.

Steps to solve a case study?

 How to solve a case study? Here we are providing simple steps that how to solve case study properly.

1. Read the case carefully

First of all, you must read case study carefully.

2. Become familiar with the topic

In second step, become familiar with the topic.

Get involved in characters, and

Need for Online Studies

Today’s world is a world of rapid changes. Particularly, the Information and Communication technology has ushered an era of the use of computer and internet in every field of life. Whole approach towards teaching and learning process has changed. Even before the advent of the covid-19 pandemic, the 4G internet had opened a whole new world of possibilities in pedagogical practices.

How can We Save Our Environment?

“Save Environment” is a slogan that has developed to represents several acts aimed at preserving the purity of our environment. Our environment suffers from several risk factors. Some of the steps that can lead to a better and safe environment are discussed in the following paragraphs.

At first, control electricity consumption,

Use of Cell Phone at School

The use of cell phones in schools by students has become a debatable topic that concerns all segments of society, including students, parents, and teachers. The use of cell phones should be banned or maximum restricted in schools.

The first argument is that mobile phones disrupt the learning process by causing interruptions