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.
Calculate the work done when a force of 20N stretches a spring by 50mm.
0.5J
1.5J
2.0J
2.5J
Correct answer is A
W = \(\frac{1}{2}Fe\)
W = \(\frac{1}{2}\times 20 \times 0.05\)
W = 0.5J
2.2.5 x 10 5js-1
2.5 x 104js-1
3.3 x 103js-1
3.3 x 102js-1
Correct answer is C
P = \(\frac{mgh}{t}\)
P = \(\frac{5000 \times 10 \times 60}{(15 \times 60)s}\)
P = 3333.3333
P = 3.3 x 103js-1
25.0m
20.0m
1.3m
1.0m
Correct answer is C
P.E = K.E
Therefore, h = \(\frac{v^2}{2g} = \frac{5^2}{2 \times 10}\)
= 1.25
Approx 1.3 (C)
0.8
0.5
0.2
0.1
Correct answer is C
\(\frac{0.25 \times 10^3} {1.25 \times 10^3}\) = 0.2
686N
595N
581N
105N
Correct answer is D
Wt loss = mg - m (g - a)
= 70 x 10 - 70 (10 - 1.5) = 105N