Physics Classroom: Force Worksheets
When it comes to learning physics in class 8, chapter 1 is all about force and pressure. This is a fundamental concept in physics that forms the basis of many other topics that you'll learn in the subject. To help you understand this topic better, there are many resources available, including worksheets, notes, and questions and answers.
One of the best ways to get started with learning about force is by understanding what it actually is. Force is a physical quantity that describes the interaction between two objects. It is a vector quantity, which means it has both magnitude and direction. In class 8, you'll learn that force is measured in units of Newtons (N).
Another important concept that you'll come across in chapter 1 is pressure. Pressure is defined as the force per unit area, and it is measured in units of Pascals (Pa). In class 8, you'll learn about different types of pressure, including atmospheric pressure and liquid pressure.
To help you solidify your understanding of these concepts, there are many worksheets available on force and pressure for class 8. These worksheets typically contain a range of questions and problems that test your knowledge and understanding of the topic. Some of the most common types of questions you'll come across include numericals, multiple choice questions, and short answer questions.
In addition to worksheets, there are also many notes available on force and pressure for class 8. These notes typically cover all the key concepts and formulas you need to know to succeed in this topic. Some notes also come with detailed explanations and examples to help you understand the concepts better.
If you're looking for more interactive ways to learn about force and pressure, there are also many activities and solutions available. These activities can help you understand the concepts in a more hands-on way, and the solutions provide detailed explanations of the steps involved in solving each problem.
Finally, there are many resources available on specific subtopics within force and pressure, such as electrostatic force and types of contact force. These resources can help you develop a deeper understanding of these subtopics and their importance in the larger concept of force and pressure.
In summary, learning about force and pressure in class 8 physics is crucial for understanding many other concepts in the subject. There are many resources available, including worksheets, notes, questions and answers, activities, and solutions, to help you succeed in this topic. Whether you're looking for numericals, multiple choice questions, short answer questions, or detailed explanations, there is a resource out there that can help you.
MCQ's on force class 8
Force class 8 Extra Questions and Answers
Q: What is force? A: Force is a push or pull upon an object resulting from the object's interaction with another object.
Q: What is the SI unit of force? A: The SI unit of force is Newton (N).
Q: What are the two types of forces? A: The two types of forces are contact forces and non-contact forces.
Q: Give an example of contact force. A: Examples of contact force include friction, tension, and normal force.
Q: Give an example of non-contact force. A: Examples of non-contact force include gravitational force, electrostatic force, and magnetic force.
Q: What is friction? A: Friction is the force that opposes motion between two surfaces in contact.
Q: Give an example of friction. A: Examples of friction include walking on a road, rubbing hands together to create heat, and the brakes of a car.
Q: What is the direction of frictional force? A: The direction of frictional force is opposite to the direction of motion or attempted motion.
Q: What is net force? A: Net force is the overall force acting on an object when all the individual forces acting on it are added together.
Q: What is the formula for calculating force? A: Force = mass x acceleration (F = ma)
Q: What is pressure? A: Pressure is defined as force per unit area.
Q: What is the unit of pressure? A: The unit of pressure is Pascal (Pa).
Q: What is atmospheric pressure? A: Atmospheric pressure is the pressure exerted by the weight of the atmosphere.
Q: What is the value of atmospheric pressure at sea level? A: The value of atmospheric pressure at sea level is about 101,325 Pa.
Q: Give an example of muscular force. A: Examples of muscular force include lifting a weight, kicking a ball, and running.
Q: What is electrostatic force? A: Electrostatic force is the force exerted by electrically charged objects upon each other.
Q: What is the direction of electrostatic force? A: The direction of electrostatic force depends on the nature of the charges. Like charges repel each other, while opposite charges attract each other.
Q: What is the difference between weight and mass? A: Mass is a measure of the amount of matter in an object, while weight is the force exerted on an object due to gravity.
Q: What is the formula for calculating weight? A: Weight = mass x gravitational acceleration (W = mg)
Q: What is the gravitational acceleration on Earth? A: The gravitational acceleration on Earth is approximately 9.8 m/s^2.
Q: What is the relationship between force and acceleration? A: According to Newton's Second Law of Motion, the acceleration of an object is directly proportional to the force applied to it, and inversely proportional to its mass.
Q: What is the relationship between force and pressure? A: The pressure exerted by a force on a surface is directly proportional to the magnitude of the force, and inversely proportional to the area over which it is distributed.
Q: Give an example of pressure. A: Examples of pressure include the weight of a book on a table, the force exerted by a gas on the walls of a container, and the force exerted by a fluid on the bottom of a vessel.
Q: What are some applications of force and pressure in everyday life? A: Some applications of force and pressure in everyday life include walking, driving a car, lifting objects, pumping air into a tire, and drinking from a straw.
force chapter important questions with answers
What is force? Force is a physical quantity that can change the state of motion or shape of an object. It is a push or pull that can be measured in newtons (N).
What are the types of forces? There are various types of forces, such as contact forces (friction, normal force, tension force, etc.) and non-contact forces (gravitational force, electrostatic force, magnetic force, etc.).
What is friction? Friction is a contact force that opposes motion between two surfaces that are in contact with each other. It is caused by irregularities on the surface of objects.
What is normal force? Normal force is a contact force that is perpendicular to the surface of contact between two objects. It is the force that prevents objects from passing through each other.
What is the difference between mass and weight? Mass is a measure of the amount of matter in an object, whereas weight is the force exerted on an object due to gravity. Mass is measured in kilograms, whereas weight is measured in newtons.
What is the unit of force? The unit of force is the newton (N).
What is pressure? Pressure is the force exerted per unit area. It is measured in pascals (Pa).
What is atmospheric pressure? Atmospheric pressure is the pressure exerted by the Earth's atmosphere on the surface of the Earth. It is caused by the weight of air above the surface.
What is electrostatic force? Electrostatic force is a non-contact force that occurs between charged particles. It can be attractive or repulsive, depending on the charges of the particles.
What is gravitational force? Gravitational force is a non-contact force that occurs between two objects due to their masses. It is an attractive force that decreases as the distance between the objects increases.
Numerical word problems on force chapter clas 8th which can be asked for 4 marks (4 marks questions on force class 8)
F = 5 N m = 2 kg
Using F = ma, we can find the acceleration: a = F/m = 5/2 = 2.5 m/s^2
m = 0.1 kg F = 2 N g = 10 m/s^2
We know that the work done by the force is equal to the change in kinetic energy:
W = ΔK
The initial kinetic energy of the ball is zero, so the work done by the force goes into increasing the potential energy of the ball.
W = F * d = m * g * h
where h is the maximum height.
So, h = W/mg = (2 * 0.1)/(10 * 0.1) = 0.2 m
Therefore, the maximum height the ball can reach is 0.2 m.
m = 10 kg F = 50 N μ = 0 (since it is on a smooth surface)
Using F = ma, we can find the acceleration:
a = F/m = 50/10 = 5 m/s^2
Therefore, the acceleration of the block is 5 m/s^2.
m = 5 kg F = 10 N μ = 0.2
The force of friction is given by:
f = μmg = 0.2 * 5 * 10 = 10 N
The net force acting on the block is:
Fnet = F - f = 10 - 10 = 0 N
Since there is no net force, the acceleration of the block is zero.
Therefore, the acceleration of the block is zero.
m = 2 kg F = 20 N
The force of tension in the string is equal to the weight of the block:
T = mg = 2 * 9.8 = 19.6 N
Therefore, the tension in the string is 19.6 N.