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Physics > Physics 7 > Flashcards

Physics 7 Flashcards

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1
Q

The acceleration directed toward the center of a circular path

A

Centripetal acceleration

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2
Q

The mutual force of attraction between particles of matter

A

Gravitational force

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3
Q

A quantity that measures the ability of a force to rotate an object around some axis

A

Torque

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4
Q

The perpendicular distance from the axis of rotation to a line drawn along the direction of the force

A

Lever arm

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5
Q

Tangential speed depends on ________.

A

Distance

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6
Q

Centripetal acceleration is due to a change in ______.

A

Direction

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7
Q

Tangential acceleration is due to a change in _____.

A

Speed.

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8
Q

Centripetal force is necessary for ______ ______.

A

Circular motion

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9
Q

Inertia is often interpreted as a _____.

A

Force

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10
Q

Orbiting objects are in ___ ___.

A

Freefall

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11
Q

The gravitational force depends on the ________ and the _______.

A

Masses, distance

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12
Q

Gravitational force acts between all _____.

A

Masses

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13
Q

Newton’s law of gravitation accounts for ______ _____.

A

Ocean tides

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14
Q

Cavendish finds the value of __ and ____ _____.

A

G, Earth’s mass

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15
Q

Gravity is a ____ _____.

A

Field force

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16
Q

Gravitational field strength equals ___-____ _____.

A

Free-fall acceleration

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17
Q

Weight changes with ______.

A

Location

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18
Q

Gravitational mass equals _______ ____.

A

Inertial mass

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19
Q

Kepler’s three laws describe the ______ of the ______.

A

Motion, planets

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20
Q

Kepler’s laws are consistent with _______ ____ __ _____.

A

Newton’s law of gravitation

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21
Q

Kepler’s third law describes _____ _____.

A

Orbital period

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22
Q

Astronauts in orbit experience __________.

A

Weightlessness

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23
Q

Rotational and translational motion can be ______.

A

Separated

24
Q

Torque depends on the _____ and the _____ ___.

A

Force, lever arm

25
Q

The lever arm depends on the _____.

A

Angle

26
Q

A simple machine is used to change the direction or the magnitude of an _____ _____.

A

Input force

27
Q

Machines can alter the _____ and the _____ _____.

A

Force, distance moved

28
Q

Efficiency is a measure of how well _ ____ ____.

A

A machine works

29
Q

_____ _____ depends on distance.

A

Tangential speed

30
Q

______ _______ is due to a change in direction.

A

Centripetal acceleration

31
Q

_______ ______ is due to a change in speed.

A

Tangential acceleration

32
Q

______ _____ is necessary for circular motion.

A

Centripetal force

33
Q

______ is often interpreted as a force.

A

Inertia

34
Q

_____ _____ are in free fall.

A

Orbiting objects

35
Q

________ _____ depends on the masses and the distance.

A

Gravitational force

36
Q

________ ______ acts between all masses.

A

Gravitational force

37
Q

________ ___ __ _______ accounts for ocean tides.

A

Newton’s law of gravitation

38
Q

______ finds the value of G and Earth’s mass.

A

Cavendish

39
Q

______ is a field force.

A

Gravity

40
Q

__________ _____ _____ equals free-fall acceleration.

A

Gravitational field strength

41
Q

______ changes with location.

A

Weight

42
Q

_______ ____ equals inertial mass.

A

Gravitational mass

43
Q

________ ____ _____ describe the motion of the planets.

A

Kepler’s three laws

44
Q

_______ ____ are consistent with Newton’s law of gravitation.

A

Kepler’s laws

45
Q

______ _____ ___ describes orbital period.

A

Kepler’s third law

46
Q

________ in _____ experience weightlesness.

A

Astronauts, orbit

47
Q

________ and _______ motion can be separated.

A

Rotational, translational

48
Q

______ depends on the force and the lever arm.

A

Torque

49
Q

The _____ ___ depends on the angle.

A

Lever arm

50
Q

A _______ ________ is used to change the direction or the magnitude of an input force.

A

Simple machine

51
Q

________ can alter the force and the distance moved.

A

Machines

52
Q

__________ is a measure of how well a machine works.

A

Efficiency

53
Q

Each planet travels in an elliptical orbit around the sun, and the sun is at one of the focal points.

A

Kepler’s first law

54
Q

An imaginary line drawn from the sun to any other planet sweeps out equal.

A

Kepler’s second law

55
Q

The square of a planet’s orbital period (T^2) is proportional to the cube of the average distance (r^3) between the planet and the sun

A

Kepler’s third law

Physics (5 decks)

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