Introduction

Question 1

What are base quantities?

Answer 1

The 7 fundamental quantities of the SI

Question 2

What is a versor?

Answer 2

A vector that has a magnitude equal to 1

Question 3

What happens when you multiply a vector with a scalar?

Answer 3

It acts only on the magnitude, if it is negative the direction is changed

Question 4

4 types of motion

Answer 4

Uniform linear motion
Uniform accelerated linear motion
Uniform circular motion
Harmonic motion

Question 5

How do you change degrees to raidens?

Answer 5

Multiply by pi/180

Question 6

What does Bernoulli’s equation describe?

Answer 6

The behaviour of an incompressible fluid along a streamline
Relating the fluid velocity, elevation and pressure along that streamline

Question 7

What are observed objects?

Answer 7

Physical quantities

Question 8

What is quantification method?

Answer 8

Measurement

Question 9

What is measure?

Answer 9

The comparison between two homogeneous quantities

Question 10

How do you change celcius to Kelvin?

Answer 10

+273

Question 11

Formula for work

Answer 11

L=Fs=Fs*cos(theta)

Question 12

What is the dot product of vectors?

Answer 12

Commutative, not associative (scalar product between two vectors generates a scalar)

Question 13

What is the cross product of two vectors?

Answer 13

A vector

Question 14

Formula for cross product between two vectors?

Answer 14

C=a^b=aBsine(theta)

Question 15

What does the mixed product between vectors contain?

Answer 15

Both a scalar and a vector

Question 16

Different name for classical mechanics

Answer 16

Newtonian mechanics

Question 17

What causes a car to turn in uniform circular motion?

Answer 17

Centripetal force

Question 18

When a car turns is it inertial?

Answer 18

No

Question 19

Are objects inside a car turning inertial?

Answer 19

Yes

Question 20

What is mass?

Answer 20

A constant that is always positive

Question 21

1N=?

Answer 21

Kg*m/s^2

Question 22

Relative density=?

Answer 22

m/m’
mass/mass of equal volume distilled water at 4c

Question 23

Absolute density=?

Answer 23

m/V

Question 24

Relative specific weight=?

Answer 24

p/p’
weight/weight of equal volume of distilled water at 4c

Question 25

Absolute specific weight=?

Answer 25

p/V=(m/V)*g=absolute density*g Ratio between weight and volume

Question 26

What is torque measured in?

Answer 26

Netwon*meter Same as measurement of joule

Question 27

What is moment of force?

Answer 27

Torque

Question 28

Moment(M)=?

Answer 28

r*F

Question 29

What is momentum denoted by?

Answer 29

q

Question 30

q=?

Answer 30

m*V

Question 31

What does the principle of conservation of momentum state?

Answer 31

That in an isolated system the momentum is conserved

Question 32

m1*v1+m2*v2=?

Answer 32

0 Conservation of momentum

Question 33

Why is the recoil of earth when a man jumps infinitely small?

Answer 33

Because the mass og the earth is infinitely greater than the man's

Question 34

Force of gravity=

Answer 34

G* (m1*m2)/r^2 G= gravitational constant

Question 35

What law is elastic force?

Answer 35

Hooke's law

Question 36

Hooke's law=? F=?

Answer 36

-k*x k is a constant x is body deformation Reaction of body is directly proportional to the undergone deformation with an opposite direction

Question 37

Which law describes electrostatic force?

Answer 37

Coulomb's law

Question 38

Electrostatic force=? F=?

Answer 38

K* (q1*q2)/r^2 q are the charges K is constant (9*10^9)

Question 39

What is uniform circular motion?

Answer 39

The motion of a material point that moves on a circumference with a constant tangential velocity

Question 40

What changes from point to point in uniform circular motion?

Answer 40

The direction of the velocity (which is tangent to the trajectory)

Question 41

Centripetal acceleration=? ac=?

Answer 41

v^2/r

Question 42

What is a restoring force (shm)?

Answer 42

Acceleration directed towards the center of oscillation and proportional to the distance

Question 43

When is a force doing work?

Answer 43

When it acts on a body so that there is a displacement of the point of application in the direction of the force

Question 44

Symbol for work

Answer 44

L

Question 45

L=? (Work)

Answer 45

F*s=F*s*cos(theta)

Question 46

If the angle of work is acute what kind of work is it?

Answer 46

Positive (motor)

Question 47

If the angle of work is obtuse what kind of work is it?

Answer 47

Negative (resistant)

Question 48

If the angle of work is right what kind of work is it?

Answer 48

None, L=0

Question 49

What is the SI unit of work?

Answer 49

Joule

Question 50

What are 2 practical units of work?

Answer 50

Electronvolt (eV) Kilogram-meter

Question 51

5 forms of energy

Answer 51

Kinetic Gravitational Electric potential Thermal Chemical

Question 52

What are work and energy in relation to each other? and what does that imply?

Answer 52

They are homogenous quantities which means they have the same unit of measurement

Question 53

Formula for kinetic energy (Ec)

Answer 53

Ec=1/2*m*v^2

Question 54

What is the variation of the body's kinetic energy equal to?

Answer 54

The work done by the force F that set it in motion

Question 55

What does work indicate?

Answer 55

A transfer of energy from one form to another

Question 56

What is a force field?

Answer 56

Area of space where a force acts in each point

Question 57

What are the forces and fields defined as if the nature of the forces is such that work doesn't depend on the trajectory?

Answer 57

Conservative

Question 58

What is the work done along a closed trajectory if the forces are conservative?

Answer 58

=0

Question 59

W=? (work done on object)

Answer 59

Change in kinetic energy

Question 60

What is the change in kinetic energy in a conservative field?

Answer 60

Zero as the work done is also zero

Question 61

What is the work done along a closed trajectory in dissipative forces?

Answer 61

Not null, the work depends on the path taken from start to end point

Question 62

What is potenital energy denoted by?

Answer 62

U

Question 63

Formula for gravitational potential energy

Answer 63

U=mgh

Question 64

Is the kinetic energy theorem valid for both the conservative and non-conservative forces?

Answer 64

Yes

Question 65

What happens to the sum of the kinetic and potential energy when only conservative forces act on a body?

Answer 65

They remain constant

Question 66

Formula for principle of conservation of mechanical energy

Answer 66

U+Ek=constant

Question 67

P=?

Answer 67

L/^t=E/^t=F*(^s/^t)=F*v

Question 68

SI unit of measurement for power

Answer 68

Watt=joule/s

Question 69

A practice unit of measurement for power

Answer 69

horsepower (hp)

Question 70

What is Kleiber's law?

Answer 70

Empirical relationship between metabolic rate and mass of an organism

Question 71

What is the absorbed power which measures the speed of energy consumption in physiology called?

Answer 71

Metabolism

Question 72

What is the yield of the human body?

Answer 72

15-20% (most absorbed energy is dissipated as heat)

Question 73

Ec=?

Answer 73

F*s