Flash Cards: Exploring Forces
Exploring Forces - Flash Cards
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What is a force?
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A force is a push or pull applied to an object resulting from its interaction with another object.
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What is the SI unit of force?
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The SI unit of force is the newton (N).
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What can a force do to an object?
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A force can make an object move, change its speed, alter its direction, or change its shape.
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Define contact force.
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Contact forces require physical contact between two objects to act, such as pushing or pulling.
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What is muscular force?
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Muscular force is the force exerted by muscles when performing physical activities like lifting or pushing.
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What is friction?
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Friction is a force that opposes the motion of an object and acts in the opposite direction to its movement.
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What is a non-contact force?
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Non-contact forces can act on objects without physical contact, such as gravitational, magnetic, and electrostatic forces.
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What is gravitational force?
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Gravitational force is the force with which the Earth attracts objects towards itself, always acting downward.
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What is the difference between weight and mass?
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Mass is the amount of matter in an object, while weight is the force due to gravity acting on that mass.
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What does Archimedes' Principle state?
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Archimedes' Principle states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.
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What are the different types of forces?
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Forces are categorized as contact forces (like muscular and frictional forces) and non-contact forces (like gravitational, magnetic, and electrostatic forces).
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Why do objects float or sink?
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Objects float if the buoyant force is equal to their weight; they sink if their weight is greater than the buoyant force.
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What is buoyant force?
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Buoyant force is the upward force exerted by a fluid on an object placed in it, counteracting the weight of the object.
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How do you measure weight?
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Weight can be measured using a spring balance, which indicates the force exerted by gravity on an object.
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What is the effect of friction on moving objects?
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Friction slows down moving objects and can eventually bring them to a stop.
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What happens when two like poles of magnets are brought close?
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When like poles of magnets are brought close, they repel each other.
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What role does friction play on different surfaces?
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Friction varies with surface texture; it is stronger on rough surfaces and weaker on smooth surfaces.
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What is the outcome of applying equal and opposite forces?
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Equal and opposite forces acting on an object will cancel each other out, resulting in no change in motion (balanced forces).
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How do airplanes minimize air resistance?
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Airplanes are designed with specific shapes to reduce air resistance or drag, enhancing fuel efficiency and speed.
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What is static electricity?
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Static electricity is the build-up of electric charge on the surface of objects, often caused by friction.
