100.08m
100.04m
99.96m
99.92m
Correct answer is D
\(L_2 = L_1 + \alpha(\theta_2 - \theta_1)\)
= 100 + 0.00002(-10-30) = 99.92
0.8m3
1.4m3
3.6m3
49.m3
Correct answer is C
Mp = ep x Vp
Mp = 7.2 x 102 x 4.2 = 3024
VA = \(\frac{M}{e_A}\)
VA = \(\frac{3024}{8.4 \times 10^2}\)
VA = 3.6
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)