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.
20oC
30oC
34oC
70oC
Correct answer is A
\(\frac{x - 0}{100 - 0} = \frac{14 - 10}{30 - 10}\)
x = \(\frac{100 \times 4}{20} = 20^oC\)
Which of the following surfaces will radiate heat energy best?
Red surface
white surface
black surface
yellow surface
Correct answer is C
No explanation has been provided for this answer.
Mechanical energy can be either
kinetic or electric
chemical or potential
potential or kinetic
electric or heat
Correct answer is C
No explanation has been provided for this answer.
50.0N
120.0N
200.0N
240N
Correct answer is B
V.R = \(\frac{1}{sin\theta} = \frac{1}{sin 30} = 2\)
M.A = \(\frac{E \times V.R}{100} = \frac{50 \times 2}{100} = 1\)
Effort = \(\frac{load}{M.A} = \frac{120}{1} = 120N\)
240.0N
800.0N
1600.00N
2400.0N
Correct answer is A
S = at + \(\frac{1}{2} at^2\)
60 = 0 x 20 + \(\frac{1}{2}\) x a x 20
a = \(\frac{3}{10}\)m/s2
F = ma = 800 x \(\frac{3}{10} = 240N\)