Physics 7

Question 1

The acceleration directed toward the center of a circular path

Answer 1

Centripetal acceleration

Question 2

The mutual force of attraction between particles of matter

Answer 2

Gravitational force

Question 3

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

Answer 3

Torque

Question 4

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

Answer 4

Lever arm

Question 5

Tangential speed depends on ________.

Answer 5

Distance

Question 6

Centripetal acceleration is due to a change in ______.

Answer 6

Direction

Question 7

Tangential acceleration is due to a change in _____.

Answer 7

Speed.

Question 8

Centripetal force is necessary for ______ ______.

Answer 8

Circular motion

Question 9

Inertia is often interpreted as a _____.

Answer 9

Force

Question 10

Orbiting objects are in ___ ___.

Answer 10

Freefall

Question 11

The gravitational force depends on the ________ and the _______.

Answer 11

Masses, distance

Question 12

Gravitational force acts between all _____.

Answer 12

Masses

Question 13

Newton’s law of gravitation accounts for ______ _____.

Answer 13

Ocean tides

Question 14

Cavendish finds the value of __ and ____ _____.

Answer 14

G, Earth’s mass

Question 15

Gravity is a ____ _____.

Answer 15

Field force

Question 16

Gravitational field strength equals ___-____ _____.

Answer 16

Free-fall acceleration

Question 17

Weight changes with ______.

Answer 17

Location

Question 18

Gravitational mass equals _______ ____.

Answer 18

Inertial mass

Question 19

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

Answer 19

Motion, planets

Question 20

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

Answer 20

Newton’s law of gravitation

Question 21

Kepler’s third law describes _____ _____.

Answer 21

Orbital period

Question 22

Astronauts in orbit experience __________.

Answer 22

Weightlessness

Question 23

Rotational and translational motion can be ______.

Answer 23

Separated

Question 24

Torque depends on the _____ and the _____ ___.

Answer 24

Force, lever arm

Question 25

The lever arm depends on the _____.

Answer 25

Angle

Question 26

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

Answer 26

Input force

Question 27

Machines can alter the _____ and the _____ _____.

Answer 27

Force, distance moved

Question 28

Efficiency is a measure of how well _ ____ ____.

Answer 28

A machine works

Question 29

_____ _____ depends on distance.

Answer 29

Tangential speed

Question 30

______ _______ is due to a change in direction.

Answer 30

Centripetal acceleration

Question 31

_______ ______ is due to a change in speed.

Answer 31

Tangential acceleration

Question 32

______ _____ is necessary for circular motion.

Answer 32

Centripetal force

Question 33

______ is often interpreted as a force.

Answer 33

Inertia

Question 34

_____ _____ are in free fall.

Answer 34

Orbiting objects

Question 35

________ _____ depends on the masses and the distance.

Answer 35

Gravitational force

Question 36

________ ______ acts between all masses.

Answer 36

Gravitational force

Question 37

________ ___ __ _______ accounts for ocean tides.

Answer 37

Newton's law of gravitation

Question 38

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

Answer 38

Cavendish

Question 39

______ is a field force.

Answer 39

Gravity

Question 40

__________ _____ _____ equals free-fall acceleration.

Answer 40

Gravitational field strength

Question 41

______ changes with location.

Answer 41

Weight

Question 42

_______ ____ equals inertial mass.

Answer 42

Gravitational mass

Question 43

________ ____ _____ describe the motion of the planets.

Answer 43

Kepler's three laws

Question 44

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

Answer 44

Kepler's laws

Question 45

______ _____ ___ describes orbital period.

Answer 45

Kepler's third law

Question 46

________ in _____ experience weightlesness.

Answer 46

Astronauts, orbit

Question 47

________ and _______ motion can be separated.

Answer 47

Rotational, translational

Question 48

______ depends on the force and the lever arm.

Answer 48

Torque

Question 49

The _____ ___ depends on the angle.

Answer 49

Lever arm

Question 50

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

Answer 50

Simple machine

Question 51

________ can alter the force and the distance moved.

Answer 51

Machines

Question 52

__________ is a measure of how well a machine works.

Answer 52

Efficiency

Question 53

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

Answer 53

Kepler's first law

Question 54

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

Answer 54

Kepler's second law

Question 55

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

Answer 55

Kepler's third law