Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
i, ii, iii only
i, ii, iv only
i, iii, iv only
ii, iii, iv only
Correct answer is B
No explanation has been provided for this answer.
5 x 106
5 x 102
2 x 10-3
2 x 10-7
Correct answer is C
Strain = \(\frac{extension}{\text{original length}}\)
\(\frac{2 {\times} 10^{-5}}{0.01}\)
= 2 x 10-3
20N
25N
50N
80N
Correct answer is B
Efficiency = \(\frac{\text{work done by hand}}{\text{work done by effort}}\)
80 = \(\frac{100{\times 8}}{E {\times} 40}\) x \(\frac{100}{1}\)
E = 25N
A parachute attains a terminal velocity when
its density is equal to the density of air
the viscous force of the air and the upthrust completely counteract its weight
it expands as a result of reduced external pressure
the viscous force of the air is equal to the sum of the weight and upthrust
Correct answer is B
No explanation has been provided for this answer.
1.8m
2.0m
2.5m
3.0m
Correct answer is D
Power x time = mgh
120 x 20 = 80 x 10 x h
2400 = 800h
making h the subject of formula,divide both side by 800
\(\frac{2400}{800}\) = h
h = 3m