Q1
What happens with balanced forces?
ANo change in motion
BAcceleration occurs
CMotion stops immediately
DObject disappears
SSCClass 8 (SSC)Science (सामान्य विज्ञान)Ch 3 · Topic 1
Force and Pressure
Force can change an object's state of motion or shape, while pressure describes force distributed over an area, both fundamental physics con
Core concept
Balanced forces result in no change in an object's motion, while unbalanced forces cause acceleration, changing speed or direction.
How it works
Friction is a force that opposes motion between surfaces in contact, and it can be useful (walking) or a hindrance (machine wear).
Why it matters
Pressure equals force divided by area (P=F/A), explaining why sharp objects like needles exert more pressure than blunt ones with the same force.
Key detail
Atmospheric pressure, caused by the weight of air, affects various phenomena, including weather patterns and how our bodies function.
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• Balanced forces: no motion change.
• Unbalanced forces: cause acceleration.
• Friction: opposes motion between surfaces.
• It can be useful or a hindrance.
• Pressure = Force ÷ Area (P=F/A).
• Sharp objects exert more pressure (small area).
• Atmospheric pressure: weight of air.
• It affects weather, body function.