20N
10N
2N
1N
Correct answer is B
M = DV = 1 x 1 = 1kg
App Wt = (2 - 1)g = 1 x 10
= 10
If a load of 1 kg stretches a cord by 1.2cm, what is the force constant of the cord? {g=10ms-2}
866Nm-1
833Nm-1
769Nm-1
667Nm-1
Correct answer is B
K = \(\frac{F}{e}\)
K = \(\frac{1 \times 10}{\frac{0.2}{100}}\)
K = \(\frac{10}{12} \times \frac{1000}{1}\)
62.5%
73.3%
83.3%
94.3%
Correct answer is C
Y = \(\frac{work output}{work input} \times \frac{100}{1}\)
Y = \(\frac{250 \times 30}{250 \times 30 + 1500} \times \frac{100}{1}\)
0.2
0.3
0.5
0.6
Correct answer is D
\(\mu = tan\theta = tan30\)
8 rads-1
4 rads-1
2 rads-1
1 rads-1
Correct answer is C
W = \(\frac{v}{r} = \frac{1}{0.5}\)