rotational motion and gravitation

Question 1

what is the unit for angular displacement?

Answer 1

radians

Question 2

what is the unit for angular velocity?

Answer 2

rad/s

Question 3

velocity =

Answer 3

2 pie r / t

Question 4

ma=

Answer 4

mv^2 / r

Question 5

what’s the unit for angular acceleration?

Answer 5

rad/s^2

Question 6

counter clock wise =

Answer 6

POSITIVE torque

Question 7

clock wise =

Answer 7

NEGATIVE toruqe

Question 8

torque is ___ proportional to angular acceleration

Answer 8

DIRECTLY

Question 9

moment of inertia is the equivalent to what?

Answer 9

the mass that spends on the shape of a rotating object

Question 10

gravitational force is ____ proportional to the product of the 2 masses

Answer 10

DIRECTLY

Question 11

gravitational force is ____ proportional to the distance squared

Answer 11

INVERSELY

Question 12

Keplers first law

Answer 12

the orbit of each planet about the sun is an ellipse with the sun at one focus

Question 13

Keplers 2nd Law

Answer 13

each planet moves so that an imaginary line drawn from the sun to the planet sweeps out in equal areas in equal times

Question 14

Keplers 3rd law

Answer 14

the ratio of the squares of the periods of any two planets about the sun is equal to the ratio of the cubes of their average distances from the sun

Question 15

aphelion

Answer 15

the point where planet is closest to the sun

Question 16

periphelion

Answer 16

point where planet is furthest from the sun