Physics 2010 | Study Mode

Join Discuss Share to WhatsApp
Question 1
A
30 kmh-1
B
130 kmh-1
C
200 kmh
D
230 kmh-1
Explanation
Since the cars are moving in the same direction, the velocity of a body A, Va,relative to another body B, Vb is given by V = Va - Vb
the velocity of faster car is measured by the observer in the slower car is V = 130kmh-1 - 100 kmh-1 = 30 kmh-1

Correct option: A
Join Discuss Share to WhatsApp
Question 2
A
the feather will be brown away by the wind while stone will drop steadily
B
the stone and the feather will both reach the ground a the same time
C
the feather will reach the ground first
D
the stone will reach the ground first
Explanation
The acceleration of free fall due to gravity is independent of mass of the body. Therefore, ignoring air resistance, which affects feather more than the stone, the stone and the feather will both reach the ground at the same time

Correct option: B
Join Discuss Share to WhatsApp
Question 3
A
2 ms-2
B
5 ms-2
C
20 ms-2
D
25 ms-2
Explanation
Acceleration = (increase in velocity)/time taken
= (45 - 25)/10 = (20)/10 = 2ms-2

Correct option: A
Join Discuss Share to WhatsApp
Question 4
A
protect them while carrying loads
B
prevent the loads from slipping
C
enable them to carry more load
D
make them stronger
Explanation
Rough surface promotes friction. Therefore, roughness of conveyor belt prevents the load from slipping

Correct option: B
Join Discuss Share to WhatsApp
Question 5
A
55. 6 %
B
50.0%
C
33.3%
D
22.2%
Explanation
Efficiency = (MA)/V.R x 100% = (load)/Effort x (1)/V.R
= (800)/400 x (1)/6 x 100% = 33.3%

Correct option: C
Join Discuss Share to WhatsApp
Question 6
A
0.75 J
B
7.50 J
C
75.00 J
D
750.00 J
Explanation
Energy stored in a stretched wire (strain energy)
= average force x extension
= (1)/2 Fe
= (1)/2 x 300 N (30.5 - 30.0) x 10-2 m
= (300)/2 x 0.5 x 10-2 = 0.75J

Correct option: A
Join Discuss Share to WhatsApp
Question 7
A
300 N
B
200 N
C
150 N
D
100 N
Explanation
Thrust = pressure x area = 100 pa x 3 m2 = 300 N

Correct option: A
Join Discuss Share to WhatsApp
Question 8
A
a density bottle
B
an eureka can
C
a pipette
D
a burette
Explanation
Since relative density = mass of substance
mass of equal volume of water relative density bottle should be used to determine the mass of the substance, and mass of an equal volume of water by filling the bottle with the powder and water respectively and weighed with the beam balance.

Correct option: A
Join Discuss Share to WhatsApp
Question 9
A
vapour pressure of a fluid
B
density of liquid
C
relative humidity of a liquid
D
relative density of a liquid
Explanation
The instrument used in measuring relative density is hydrometer

Correct option: D
Join Discuss Share to WhatsApp
Question 10
A
low density
B
low freezing point
C
high specific
D
low boiling point
Explanation
The low freezing point of alcohol, -115c enable low temperatures to be measured. mercury freezes at 39c, and cannot be used in countries like Russia where winter temperatures of -40c are common

Correct option: B

Try this quiz in in E-test/CBT Mode
switch to Physics 2010 in CBT Mode

Next Page