What is the speed of an object thrown straight up when it returns to the same height?
Review: Gravity & 1D Projectile Motion

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Physics
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The speed is the same as the initial speed when it returns to the same height, assuming no air resistance.
2.
FLASHCARD QUESTION
Front
What is a projectile?
Back
A projectile is any object that is thrown, dropped, fired, or otherwise propelled, and is subject to the force of gravity.
3.
FLASHCARD QUESTION
Front
What is the formula for calculating the time an object is in the air when thrown vertically?
Back
Time in the air = (2 * initial velocity) / g, where g is the acceleration due to gravity (approximately 9.8 m/s²).
4.
FLASHCARD QUESTION
Front
What is Newton's law of gravitation?
Back
Newton's law of gravitation states that every point mass attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
5.
FLASHCARD QUESTION
Front
What is the formula for Newton's law of gravitation?
Back
F = G * (m1 * m2) / r², where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between the centers.
6.
FLASHCARD QUESTION
Front
What happens to the speed of a projectile at its highest point?
Back
At its highest point, the vertical speed of a projectile is zero, but it still has horizontal speed if it was launched at an angle.
7.
FLASHCARD QUESTION
Front
What is the acceleration of an object in free fall?
Back
The acceleration of an object in free fall near the Earth's surface is approximately 9.8 m/s² downward.
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