Last Updated on August 30, 2025 by XAM CONTENT
Hello students, we are providing case study questions for class Class 8 Science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class Class 8 Science. In this article, you will find case study questions for cbse class Class 8 Science chapter 5 Exploring Forces.
| Chapter | Exploring Forces |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | Class 8 |
| Subject | Science |
| Useful for | Class 8 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 8 Science Chapterwise Case Study |
Case Study Questions on Exploring Forces
Case Study 1: Cycling Against the Wind
Sonali and Ragini were riding their bicycles on a windy day. When moving against the wind, they had to pedal harder, but while coming downhill, their bicycles moved fast without pedalling. They also noticed it was harder to ride on rough roads than on smooth ones. These everyday experiences show how different forces — muscular force, friction, and gravity — act on moving objects.
Questions
Q1. Why did Ragini feel it was harder to pedal against the wind?
(a) Less air resistance
(b) More muscular force needed to overcome opposing force
(c) Friction disappeared
(d) Gravity increased
Q2. Which force pulled their bicycles downhill without pedalling?
(a) Frictional force
(b) Gravitational force
(c) Muscular force
(d) Magnetic force
Q3. Why was cycling harder on rough roads compared to smooth roads?
(a) Less muscular effort
(b) Greater rolling resistance due to friction
(c) Reduced gravitational pull
(d) Absence of wind
Q4. Which statement best explains their experience?
(a) Only muscular force acts while cycling.
(b) Multiple forces interact simultaneously to affect motion.
(c) Gravitational force is the only force in cycling.
(d) Motion is unaffected by external forces.
Answers with Explanations
A1. (b) More muscular force needed to overcome opposing force ✔ Wind creates air resistance that opposes motion.
A2. (b) Gravitational force ✔ Gravity pulls objects downhill, increasing their speed.
A3. (b) Greater rolling resistance due to friction ✔ Rough surfaces increase friction, making pedalling harder.
A4. (b) Multiple forces interact simultaneously ✔ Cycling involves muscular force, friction, and gravity together.
Case Study 2: Friction and Motion
A boy kicks a football across a ground. On a smooth cement floor, the ball rolls far, but on a rough sandy surface, it stops quickly. Similarly, if you stop pedalling a bicycle, it gradually slows down. These observations are due to friction, which always acts opposite to the direction of motion. Even air and water exert friction, which is why vehicles like airplanes, ships, and trains are designed in streamlined shapes.
Questions
Q1. Why does the ball stop sooner on sand than on cement?
(a) Sand has less gravity
(b) Friction is greater on rough surfaces
(c) Ball becomes lighter
(d) Sand absorbs energy
Q2. What is the direction of the force of friction?
(a) Same as motion
(b) Opposite to motion
(c) At right angles to motion
(d) Random direction
Q3. Why are vehicles designed with streamlined shapes?
(a) To reduce weight
(b) To reduce air or water resistance
(c) To increase gravitational pull
(d) To make them look attractive
Q4. Which statement is correct?
(a) Friction only acts on rough surfaces.
(b) Friction can also act in air and water.
(c) Friction always increases motion.
(d) Friction is absent on smooth surfaces.
Answers with Explanations
A1. (b) Friction is greater on rough surfaces ✔ Sand increases resistance, so the ball stops quickly.
A2. (b) Opposite to motion ✔ Friction always resists movement.
A3. (b) To reduce air or water resistance ✔ Streamlining lowers fluid friction.
A4. (b) Friction can also act in air and water ✔ Known as drag or fluid resistance.
Case Study 3: Gravitational Force and Weight
When a ball is thrown upwards, it slows down, stops, and falls back to the ground. This is due to Earth’s gravitational pull. The force with which Earth attracts objects is called gravitational force, and the weight of an object is the measure of this force. Weight is measured in newton (N), while mass is the amount of matter, measured in kilograms (kg). Unlike mass, weight can change from place to place depending on gravity.
Questions
Q1. What happens to a ball thrown vertically upwards?
(a) It moves forever upward
(b) It slows, stops, then falls back due to gravity
(c) It remains at the top
(d) It floats in air
Q2. The weight of an object is:
(a) Equal to its mass
(b) The gravitational force acting on it
(c) Always the same everywhere
(d) Measured in kilograms
Q3. Why is weight of an object on Moon less than on Earth?
(a) Moon has weaker gravity
(b) Moon has no atmosphere
(c) Mass of object reduces on Moon
(d) Distance from Sun is greater
Q4. Which statement is correct about mass and weight?
(a) Mass and weight both change from place to place
(b) Mass changes, weight remains same
(c) Mass is constant, weight varies with gravity
(d) Both are measured in newton
Answers with Explanations
A1. (b) It slows, stops, then falls back due to gravity ✔ Gravity pulls it back.
A2. (b) The gravitational force acting on it ✔ Weight = Force of gravity on mass.
A3. (a) Moon has weaker gravity ✔ Hence, objects weigh about one-sixth of their Earth weight.
A4. (c) Mass is constant, weight varies with gravity ✔ Mass doesn’t change; weight depends on gravitational pull.
We hope the given case study questions for Exploring Forces Class Class 8 helps you in your learning.
Also check
- Curiosity Class 8 Science Chapter 6 Pressure, Winds, Storms, and Cyclones Case Study Questions
- Curiosity Class 8 Science Chapter 5 Exploring Forces Case Study Questions
- Curiosity Class 8 Science Chapter 4 Electricity: Magnetic and Heating Effects Case Study Questions
- Curiosity Class 8 Science Chapter 3 Health: The Ultimate Treasure Case Study Questions
- Curiosity Class 8 Science Chapter 2 The Invisible Living World Case Study Questions
- Curiosity Class 8 Science Chapter 1 Exploring the Investigative World of Science Case Study Questions
🚀 Boost Your Exam Prep: Get case study questions for all subjects (Class 6-12) now!
👉 Explore more resources on CBSE Class 8
Topics from which case study questions may be asked
- Types of forces: contact and non-contact
- Effects of forces on motion
- Balanced and unbalanced forces
- Friction: causes and consequences
- Applications of friction
- Force measurement
- Newton’s laws overview
Force can change an object’s speed, direction, or shape—making it a fundamental concept in physics.
Important Keywords
- Force – A push or pull applied on an object.
- Newton (N) – The unit used to measure force.
- Muscular Force – Force applied using muscles of humans or animals.
- Friction – A force that resists motion when two surfaces are in contact.
- Contact Force – Force that requires physical contact between objects.
- Non-contact Force – Force that acts without direct contact between objects.
- Magnetic Force – Force by which a magnet attracts or repels magnetic materials.
- Electrostatic Force – Force between charged bodies (like rubbed balloons or scale attracting paper).
- Gravitational Force – The Earth’s pull on objects, making them fall down.
- Weight – The gravitational force with which Earth pulls an object.
- Mass – The amount of matter in an object; it does not change with place.
- Spring Balance – A tool used to measure the weight of objects.
- Upthrust (Buoyant Force) – The upward force applied by a liquid on objects placed in it.
- Archimedes’ Principle – States that an object in liquid experiences an upward force equal to the weight of the liquid it displaces.
- Balanced Forces – When two or more forces acting on an object cancel each other, keeping it at rest.
- Unbalanced Forces – When forces on an object do not cancel, causing motion or change in speed/direction.
- Streamlined Shape – Smooth shape designed to reduce friction from air or water.
Download Customised White Label Study Materials in MS Word Format
We are providing teaching resources to teachers and coaching institute looking for customised study materials in MS word format. Our High-quality editable study material which is prepared by the expert faculties are Highly useful for Teachers, Mentors, Tutors, Faculties, Coaching Institutes, Coaching Experts, Tuition Centers.
Frequently Asked Questions (FAQs) on Exploring Forces Case Study Questions
Q1: What is force?
A1: Force is a push or a pull that can make an object move, stop, change speed, change direction, or change shape.
Q2: Why does a moving ball on the ground stop after some time?
A2: The ball stops because of friction, which acts between the ball and the ground in the opposite direction of motion.
Q3: What is the difference between mass and weight?
A3: Mass is the amount of matter in an object and stays the same everywhere.
Weight is the pull of gravity on the object and can change from place to place (for example, on Earth and Moon).
Q4: Give an example of a non-contact force.
A4: When a magnet attracts an iron nail without touching it, this is an example of magnetic force, a non-contact force.
Q5: Why do objects float or sink in water?
A5: Objects float when the upthrust (buoyant force) of water is equal to their weight, and sink when their weight is greater than the upthrust.
Q6: Why are vehicles like cars, airplanes, and ships made in streamlined shapes?
A6: They are made streamlined to reduce friction from air or water, so they can move faster and use less energy.
Q7: Are there any online resources or tools available for practicing class 8 science curiosity “Exploring Forces” case study questions?
A7: We provide case study questions for CBSE Class 8 Science Curiosity on our website. Students can visit the website and practice sufficient case study questions and prepare for their exams. If you need more case study questions, then you can visit Physics Gurukul website. they are having a large collection of case study questions for all classes.
