Chapter 1 - Kinematics and Dynamics

Question 1

Base Units

Answer 1

Standard units around which the system itself is designed

Question 2

Derived Units

Answer 2

Created by associating base units with each other

Question 3

Vectors

Answer 3

Numbers that have magnitude and direction
- Displacement, velocity, acceleration, force

Question 4

Scalars

Answer 4

Numbers that have magnitude only, no direction
- Distance, speed, energy, pressure, mass

Question 5

Displacement

Answer 5

Change in position in space
- Vector

Question 6

Velocity

Answer 6

Rate of change of displacement in a given unit of time
- Vector

Question 7

Force

Answer 7

Pushing or pulling on objects
- Vector

Question 8

Gravity

Answer 8

Attractive force felt by all forms of matter

Question 9

Friction

Answer 9

Force that opposes the movement of objects

Question 10

Static Friction

Answer 10

Exists between stationary object and the surface upon which it rests

Question 11

Coefficient of Static Friction

Answer 11

Unitless quantity that is dependent on the 2 materials in contact

Question 12

Normal Force

Answer 12

component of the force between 2 objects in contact that is perpendicular to the plane of contact between the object and the surface it rests on

Question 13

Kinetic Friction

Answer 13

Exists between a sliding object and the surface over which it slides

Question 14

Mass

Answer 14

Amount of matter in an object
- Scalar

Question 15

Weight

Answer 15

Measure of gravitational force on an object’s mass
- Vector

Question 16

Acceleration

Answer 16

rate of change of velocity that an object experiences as a result of some applied force
- Vector

Question 17

Law of Inertia (First Law)

Answer 17

A body either at rest or in motion with constant velocity will remain that way unless a net force acts upon it

Question 18

Second Law

Answer 18

An object of mass m will accelerate when the vector sum of the forces results in some nonzero resultant force vector

Question 19

Third Law

Answer 19

To every action, there is always an opposed but equal reaction

Question 20

Linear Motion

Answer 20

Object’s velocity and acceleration are along the lines of motion, so the pathway of the moving object continues along a straight line

Question 21

Terminal Velocity

Answer 21

Velocity at which air resistance is equal to gravitational force and no acceleration occurs for an object in free fall

Question 22

Projectile Motion

Answer 22

Motion that follows a path along 2 dimensions

Question 23

Circular Motion

Answer 23

Occurs when forces cause an object to move in a circular pathway

Question 24

Uniform Circular Motion

Answer 24

Instantaneous velocity vector is always tangent to the circular path

Question 25

Centripetal Force

Answer 25

Keeps object from breaking circular pathway

Question 26

Dynamics

Answer 26

Study of forces and torques

Question 27

Translational Equilibrium

Answer 27

Exists only when the vector sum of all of the forces acting on an object is 0

Question 28

Rotational Motion

Answer 28

occurs when forces are applied against an object in such a way as to cause the object to rotate around a fixed pivot point (fulcrum)

Question 29

Torque

Answer 29

Movement of force

Question 30

Rotational Equilibrium

Answer 30

Exists only when the vector sum of all the torques acting on an object is 0