Physics Exam1

Question 0

Kinematics

Answer 0

Deals with the concepts that are needed to describe motion without forces

Question 1

Mechanics

Answer 1

Branch of physics that focuses on the motion of objects and the forces that cause them to change

Question 2

Dynamics

Answer 2

Deals with the effect that forces have on motion

Question 3

Distance

Answer 3

Total travel

Question 4

Displacement

Answer 4

Change in position

Question 5

Newton’s 1st law

Answer 5

If an obj moves in a straight line with constant speed, no nrt force must be acting on it

Question 6

Newtons 2nd law

Answer 6

If a net force is acting on a body, then the body accelerates in the direction of the net force

Question 7

Newtons 3rd law

Answer 7

For every force that acts on an obj there is a reaction force equal and opposite acting on a different object

Question 8

Force

Answer 8

Push or pull

Question 9

Law of inertia

Answer 9

Newtons 1st law. Tendency of an obj to be at rest and a quantitative measure of mass

Question 10

Reference frame

Answer 10

Viewpoint of observer

Question 11

Weight

Answer 11

The net gravitational force exerted on you by the universe

Question 12

Apparent weight

Answer 12

The weight measured during a change in velocity resulting in another acceleration component to gravity

Question 13

Energy

Answer 13

• capacity to do work
• describes the state of a system in relation to the actions of the fundamental forces
• property of all matter and is observed through speed, mass, position

Question 14

Force

Answer 14

Agent of change. Energy is a measure of change

Question 15

Work

Answer 15

Change in energy of a system resulting from the application of a force acting over a distance

Question 16

Work-energy theorem

Answer 16

Total work done on an object is equal to its change in kinetic energy

Question 17

Conservative force

Answer 17

The work it does is stored in the form of energy and can be releases at a later time

Question 18

Kinetic energy

Answer 18

Energy in which it posesses due yo its motion

Question 19

Potential energy

Answer 19

Energy stored in a body or system due to its position in a force field

Question 20

Fluids

Answer 20

Particles that easily move and change in position

Question 21

Mass density

Answer 21

Mass os substance per unit volume

Question 22

Archimedes principle

Answer 22

“Any fluid applies a buoyant force to an obj that is partially or completely immersed in it; the magnitude oft he buoyant force equals the weight of the fluid thatt he obj displaces”

-how a ship floats

Question 23

Pascal’s Principle

Answer 23

“Any change in the pressure applied to a completrly enclosed fluid is transmitted undiminished to all parts of tr fluid and enclosing walls” -hydraulic lift

Question 24

Floating

Answer 24

An obj floats when it displaces an amount of fluid equal to itd weight

Question 25

Steady flow

Answer 25

Velocity of the fluid at any point is constant in time

Question 26

Unsteady flow

Answer 26

Velocity of a fluid at a point changes as time passes

Question 27

Turbulent flow

Answer 27

Erratic changed in magnitude and direction of fluid velocity

Question 28

Bernoullis equation

Answer 28

“In a steady flow of a nonviscous, incompressible fluid of density, the pressure, fluid speed and the elevation at any teo points are related

Question 29

Ideal fluids

Answer 29

No frictional loss and no molecular interaction

Question 30

Specific heat

Answer 30

The tempersture change due to hesting a specific mass of a substance

Question 31

Thermodynamics

Answer 31

Branch of physics that is built upon the laws that heat and work obey

Question 32

Zeroth law of thermodynamics

Answer 32

Two objects separately in thermal equilibrium with a third body, will be in thermal equilibrium with eachother if placed in thermal contact