Curved & Rotational Motion

Question 1

Uniform Circular Motion

Answer 1

Motion of objects moving in a circle at constant uniform speed

Question 2

Center of mass

Answer 2

Point where all mass of an object can be considered to be concentrated

Question 3

Torque

Answer 3

The measure of how effectively a force can make an object spin or rotate

Question 4

Pivot Point (fulcrum)

Answer 4

Center of turning

The point that does not move while remainder of object is rotating, becoming center of circle

Question 5

Lever arm

Answer 5

Perpendicular distance from pivot point to “line of action” of force

Question 6

Angular momentum

Answer 6

Rotational analog for linear momentum

Question 7

Rigid Body

Answer 7

All points along radial line always has same angular displacement

Question 8

Kepler’s 1st Law

Answer 8

Orbit of each planet is an ellipse & sun is at one focus

Question 9

Kepler’s 2nd Law

Answer 9

An imaginary line from sun to moving plant sweeps out equal areas in equal intervals of time