Week 1

Question 1

Physics of physiology

Answer 1

application of physics to the understanding of the function of the human body in health & disease -

Question 2

clinical medical physics

Answer 2

application of physics in the instrumentation used in diagnosis & treatment

Question 3

fundamental quantities (7):

Answer 3

1 - length, m
2 - time, s
3 - mass, kg
4 - electrical current, A (ampere)
5 - temperature, K
6 - amt of substance, mol
7 - luminosity, cd (candela)

Question 4

nano

Answer 4

n
10^-9

Question 5

micro

Answer 5

μ
10^-6

Question 6

mili

Answer 6

10^-3

Question 7

kilo

Answer 7

k

10³

Question 8

mega

Answer 8

M
10⁶

Question 9

giga

Answer 9

G
10⁹

Question 10

accuracy

Answer 10

how close a given measurement to a given standard

Question 11

precision

Answer 11

reproducibility of a measurement, not necessarily related to the accuracy

Question 12

Newton’s 1st Law:

Answer 12

Any object continues at rest, or at constant velocity, unless an external F acts on it

essentially, F is anything that is measurable and causes a change in the motion of an object

Question 13

Newton’s 2nd Law:

Answer 13

External force gives an object an acceleration. The acceleration produced is proportional to the force applied, and the constant of proportionality is the mass.

F=mα
N = kg*m/s^2

Question 14

Newton’s 3rd Law:

Answer 14

Fs come in pairs: f/ every F applied TO the body, there is a F applied BY that body
!action F & reaction F are acting on diff objects!

Question 15

Newton’s 3rd Law:

Answer 15

Fs come in pairs: f/ every F applied TO the body, there is a F applied BY that body
!action F & reaction F are acting on diff objects!

Question 16

friction -

Answer 16

F directed along the surface, opposite the direction of the intended motion

Question 17

Normal F

Answer 17

perpendicular component of the contact Force b/w 2 objects in physical contact w/ each other

Question 18

statics

Answer 18

study of F in equilibrium, study of bodies which are not moving

Question 19

positive torque -

Answer 19

motion in counter-clockwise direction (ccw)

Question 20

negative torque -

Answer 20

motion in clockwise direction (cw)

Question 21

a system is said to be in equilibrium when:

Answer 21

net F of that system is 0 and net torque of the system is 0

Question 22

stable equilibrium:

Answer 22

system will return to equilibrium after a small displacement

Question 23

unstable equilibrium

Answer 23

system will not return to equilibrium after a small displacement

Question 24

for a system in static equilibrium all torques:

Answer 24

are balanced => no net torque

Question 25

Principle of moments:

Answer 25

at equilibrium the sum of cw moments = ccw moments
ΣFcwdcw = ΣFccwdccw

Question 26

1st class lever:

Answer 26

fulcrum in the middle, Work/Load & Force act on opposite sides in the same direction

Question 27

2nd class lever

Answer 27

W(load) in the middle

ex: standing on tip toes

Question 28

3rd class lever

Answer 28

F(muscle effort) in the middle

Question 29

distance an object travels -

Answer 29

length of the path that the object took in travelling
from one place to another, scalar

Question 30

Displacement

Answer 30

s the distance travelled, but with a direction associated, vector

Question 31

average velocity

Answer 31

displacement divided by the elapsed time, vector

Question 32

Acceleration

Answer 32

how rapidly the velocity of an object is changing, defined as the change in velocity divided by the time taken to make this change, vector

Question 33

Is torque a force?

Answer 33

No, it’s a moment

Question 34

torque -

Answer 34

physical quantity which causes an object to begin to rotate or move in a circle or to change its rate of rotation

Question 35

The amount of turning produced by the force applied to a rod will depend

Answer 35

• on the magnitude of the force (F) and
• the length of the rod (d)

𝝉 = 𝐅d

Question 36

centre of gravity -

Answer 36

a point where all weight of an object acts

Question 37

centre of mass

Answer 37

point at which the total mass of a body may be considered to be concentrated (for many purposes) in analysing its motion