Exploring Forces
CBSE · Class 8 · Science
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Quick Quiz: Exploring Forces
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What is a force?
What is the SI unit of force?
Muscular force is an example of which type of force?
Which force always acts opposite to the direction of motion?
Sample Questions
Which of the following are effects of force on objects?
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Change in speed, Change in direction, Change in shape, Start motion from rest
Force can change speed, direction, shape of objects and can make objects move from rest. However, force cannot change the color of objects - that requires chemical or physical processes.
Which of the following are non-contact forces?
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Magnetic force, Gravitational force, Electrostatic force
Magnetic, gravitational, and electrostatic forces can act without physical contact between objects. Muscular force and friction require physical contact to work.
What happens when like charges are brought close to each other?
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They repel each other
Like charges (positive-positive or negative-negative) always repel each other, while unlike charges (positive-negative) attract each other. This is a fundamental property of electrostatic force.
Gravitational force is always:
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Attractive
Gravitational force is always attractive. The Earth always pulls objects towards itself. Unlike magnetic or electrostatic forces, gravitational force cannot be repulsive.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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