rotational motion

Question 1

motion in a circular path at constant speed

Answer 1

uniform circular motion

Question 2

occurs when points in an object move in circular paths centered on one point

Answer 2

pure rotational motion

Question 3

is motion with no rotation.

Answer 3

pure translational motion

Question 4

the ratio of the arc length to the radius of curvature Δθ = Δs/r. It is the amount of rotation and is analogous to linear distance

Answer 4

rotational angle

Question 5

is the distance traveled along a circular path

Answer 5

arc length

Question 6

it is the rate of change of an angle. In symbols, this is ω = Δθ/Δt .

Answer 6

angular velocity

Question 7

acceleration of an object moving in a circle toward the center.

Answer 7

centripetal acceleration

Question 8

is a rotating device used to separate specimens of different densities

Answer 8

centrifuge

Question 9

it causes an object to turn in a circle. Any net force causing uniform circular motion

Answer 9

centripetal force

Question 10

A frame of reference which is at a constant velocity with respect to other frames of reference. Acceleration of the frame is zero. It obeys Newton’s Laws of motion

Answer 10

inertial frame of reference

Question 11

A frame of reference which is at a constant acceleration with respect to other frames of reference. Acceleration of the frame is nonzero. Inertial frame of reference does not obey Newton’s Laws of motion

Answer 11

non inertial frame of reference

Question 12

is an inertial or fictitious force that acts on objects that are in motion within a frame of reference that rotates with respect to an inertial frame.

Answer 12

Coriolis force

Question 13

it states that every particle in the universe attracts every other particle with a force along a line joining them. The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Answer 13

Newton’s Universal Law of Gravitation

Question 14

The moon’s gravity pulls at the Earth, causing predictable rises and falls in sea levels known as?

Answer 14

tides

Question 15

it is a clever way to measure the Gravitational Constant that is stated in the Universal Gravitation Equation

Answer 15

cavendish experiment

Question 16

the curve in a road that is sloping in a manner that helps a vehicle negotiate the curve

Answer 16

banked curve

Question 17

the point where the entire mass of an object can be thought to be concentrated

Answer 17

center of mass

Question 18

a fictitious force that tends to throw an object off when the object is rotating in a non-inertial frame of reference

Answer 18

centrifugal force

Question 19

a force having no physical origin

Answer 19

fictitious force

Question 20

a proportionality factor used in the equation for Newton’s universal law of gravitation; it is a universal constant—that is,
it is thought to be the same everywhere in the universe

Answer 20

gravitational constant

Question 21

the angle at which a car can turn safely on a steep curve, which is in proportion to the ideal speed

Answer 21

ideal angle

Question 22

the sloping of a curve in a road, where the angle of the slope allows the vehicle to negotiate the curve at a certain speed without the aid of friction between the tires and the road; the net external force on the vehicle equals the horizontal centripetal force in the absence of friction

Answer 22

ideal banking

Question 23

the maximum safe speed at which a vehicle can turn on a curve without the aid of friction between the tire and the road

Answer 23

ideal speed

Question 24

an environment in which the apparent net acceleration of a body is small compared with that produced by Earth at its surface

Answer 24

microgravity

Question 25

a tiny indentation on the spiral track molded into the top of the polycarbonate layer of CD

Answer 25

pit

Question 26

a unit of angle measurement

Answer 26

radians

Question 27

radius of a circular path

Answer 27

radius of curvature

Question 28

a centrifuge optimized for spinning a rotor at very high speeds

Answer 28

ultracentrifuge