Unit 2 Test
Flashcard
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is gravitational pull?
Back
Gravitational pull is the force exerted by a mass that attracts other masses towards it. It is responsible for keeping planets in orbit and causing objects to fall towards the Earth.
2.
FLASHCARD QUESTION
Front
What happens to an object when an unbalanced force acts on it?
Back
When an unbalanced force acts on an object, it causes the object to accelerate in the direction of the net force.
3.
FLASHCARD QUESTION
Front
What is inertia?
Back
Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.
4.
FLASHCARD QUESTION
Front
What causes tides on Earth?
Back
Tides are caused by the gravitational pull of the Moon and the Sun on Earth's oceans, leading to the rise and fall of sea levels.
5.
FLASHCARD QUESTION
Front
What is free fall?
Back
Free fall is the motion of an object under the influence of gravity alone, where it experiences weightlessness.
6.
FLASHCARD QUESTION
Front
How do you calculate force?
Back
Force is calculated using the formula: Force (F) = Mass (m) × Acceleration (a). The unit of force is Newton (N).
7.
FLASHCARD QUESTION
Front
What is the relationship between mass and weight?
Back
Weight is the force exerted by gravity on an object, calculated as Weight = Mass × Gravitational Acceleration (9.8 m/s² on Earth).
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