Physics Quiz
Quiz
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
Alex Wood
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12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of centripetal force?
A force that is directed at right angles to the path of a moving object and that causes the object to follow a circular path.
A force that is directed in the same direction as the path of a moving object.
A force that is directed opposite to the path of a moving object.
A force that is directed at an angle to the path of a moving object.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of an ellipse?
A closed curve of oval shape for which the sum of the distances from any point on the curve to two internal focal points is a constant.
A closed curve of circular shape for which the sum of the distances from any point on the curve to two internal focal points is a constant.
A closed curve of rectangular shape for which the sum of the distances from any point on the curve to two internal focal points is a constant.
A closed curve of triangular shape for which the sum of the distances from any point on the curve to two internal focal points is a constant.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of escape speed?
The speed that a projectile, space probe, or similar object must reach in order to escape the gravitational influence of Earth or of another celestial body to which it is attracted.
The speed that a projectile, space probe, or similar object must reach in order to enter the gravitational influence of Earth or of another celestial body to which it is attracted.
The speed that a projectile, space probe, or similar object must reach in order to orbit the gravitational influence of Earth or of another celestial body to which it is attracted.
The speed that a projectile, space probe, or similar object must reach in order to collide with the gravitational influence of Earth or of another celestial body to which it is attracted.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of gravitational force?
The attractive force between objects due to mass.
The repulsive force between objects due to mass.
The attractive force between objects due to charge.
The repulsive force between objects due to charge.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of the inverse-square law?
A law relating the intensity of an effect to the inverse square of the distance from the cause.
A law relating the intensity of an effect to the square of the distance from the cause.
A law relating the intensity of an effect to the inverse of the distance from the cause.
A law relating the intensity of an effect to the distance from the cause.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of the law of universal gravitation?
Every body in the universe attracts every other body with a mutually attracting force. For two bodies, this force is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them.
Every body in the universe attracts every other body with a mutually attracting force. For two bodies, this force is directly proportional to the sum of their masses and inversely proportional to the square of the distance separating them.
Every body in the universe attracts every other body with a mutually attracting force. For two bodies, this force is directly proportional to the product of their masses and inversely proportional to the distance separating them.
Every body in the universe attracts every other body with a mutually attracting force. For two bodies, this force is directly proportional to the sum of their masses and inversely proportional to the distance separating them.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the definition of a parabola?
The curved path followed by a projectile near Earth under the influence of gravity only.
The straight path followed by a projectile near Earth under the influence of gravity only.
The circular path followed by a projectile near Earth under the influence of gravity only.
The zigzag path followed by a projectile near Earth under the influence of gravity only.
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