Directions: Write a brief or short description for each of the given terms.
1. Gravity *
2. Friction *
3. Difference between mass and weight *
4. Free fall *
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Answers
Answer:
1:-.Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter.
2:-Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
3:-mass is the amount of "matter" in an object (though "matter" may be difficult to define), whereas,
weight is the force exerted on an object by gravity.
4:-free fall is defined as the motion of an object where gravity is the only force acting upon it. By this definition then, a skydiver is never in true free fall, even before they deploy their parachute..
Explanation:
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Answer:
1. Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.
2. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
3. In scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define), whereas weight is the force exerted on an object by gravity.
4. In Newtonian physics, free fall is defined as the motion of an object where gravity is the only force acting upon it. A skydiver may be pulled towards earth by gravity, but they are also affected by air resistance, a force opposing their downward movement.
Explanation:
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