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Physics Practical 2015 Free Expo Runz






Physics 3 (Practical) Answers

(3aiv)
voltmeter reading E=2.0V

Tabulate

SN: 1,2,3,4,5,6
R(ohms): 1.00|2.00|3.00|4.00|5.00|6.00
R^-1(ohm ^-1): 1.00|0.50|0.33|0.25|0.20|0.17
V(v): 1.80|2.10|2.30|2.40|2.50|2.60
V^-1(V^-1): 0.56|0.48|0.43|0.42|0.40|0.38
===========================

PLS NOTE THAT:
^ MEANS RAISE TO POWER
ohms looks like U written upside dwn ie
resistance symbol.
===========================

(3aix)
slope= ((0.56-0.38)/(1.00-0.17))
=0.18/0.81=0.22 ohm V^-1
intercept on vertical axis 0.35V^-1

(3ax)
value of c^-1=
c^-1=1/c
c^-1=1/0.35
c^-1=2.857

(3axi)
(i)I ensured that the connecting wires are tightly
connected

(ii)i avoided error due to parallax when taking the
voltmeter by ensuring i viewed the scale directly
in front of it

(3b)
Electromotive force(E.M>F) is more than the
terminal pd when current is supplied from
external resistance which drop the e.m.f of the
cell



(1aviii)
time taken for m to reach the ground, t=35.23S
(1aix)
t^2=(35.23)^2=1241.15(S)^2


(1x)
a=2h/t^2

a=((2*1.4)/1241.15)

a=0.0023m/s^2

T=(m/1000)(10-a)

T=0.05*9.9977

T=0.50S

alpha=a/R=(0.0023/(6.55*10^-2)

alpha=0.233/6.55
alpha=0.035m^2/S^2
(1axi)

Tabulate:
SN: 1,2,3,4,5

m(g): 50|70|90|110|130

t(s): 35.23|30.10|26.15|21.70|18.50

t^2(s^2): 1241.15|906.01|683.8225|470.89|
342.25|

a(m/s^2): 0.0023|0.0031|0.0041|0.0059

Tabulate:
T(s): 0.50|0.70|0.90|1.01|1.30

alpha(m^2/s^2): 0.035|0.047|0.063|0.090|0.125

(1xiv)
slope(s)=
((0.090-0.047)/(1.01-0.70)
=0.043/0.31
=0.139m^2/s^3

(xv)
I=R/s= (6.55*10^-2)/(0.139)
I=0.47m/s^2

XVI)
(i) I ensured the pulley is attached firmly to the
pin and the retort stand to avoid loosing of the
set up

(ii) I ensured the height is maintained constant
throughout for accurate results

(1bi)
Centripetal force is defined as the force which
helps to keep an object moving in a circular path
continuously

(1bii)
Given: height(h)=2.0m
Speech(v)=?
g=10m/s^2
Initial velocity(u)=0
V^2=U^2+2gh
V^2=2*10*2
V^2=40
V=root40
=6.32m/s





READ THIS VERY WELL:

WHEN WE SAY TABULATE eg: No 3aiv, it means DRAW A TABLE.

Under SN, U wil get 1,2,3,4,5,6.
Under R(ohms) u wil get
1.00,2.00,3.00,etc.

^ MEANS RAISE TO POWER

ohms looks like U written upside dwn ie resistance symbol.


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Posted By KellyChi On 06:04 Tue, 07 Apr 2015

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