15cm
12cm
10cm
8cm
5cm
Correct answer is A
Using, f1 = f2
e1 = 20 - L ; e2 = 5cm
\(\frac{f_1}{e_1}\) = \(\frac{f_2}{e_2}\)
\(\frac{100}{20 - L}\) = \(\frac{100}{5}\)
hence, L = 15cm
25N
50N
250N
500N
25 000N
Correct answer is E
F = ma
= m\(\frac{(v^2 - u^2)}{2s}\)
F = 0.05\(\frac{(0 - (500)^2)}{2 \times 0.25}\)
F = 25 000N
at the mid-point of the meter rule
40cm from the lighter mass
40cm from the heavier mass
60cm from the heavier mass
indeterninate because the meter-rule is light
Correct answer is C
No explanation has been provided for this answer.
Which of the following is NOT a force?
Friction
Tension
Upthrust
Weight
Impulse
Correct answer is E
No explanation has been provided for this answer.
0.16
0.63
0.80
1.60
2.00
Correct answer is A
F = \(\mu\)R
= \(\mu\)mg
8 = \(\mu\) x 5 x 10
\(\mu\) = 0.16