Q4 Find the units of length, mass and time
If the units of force velocity and energy
Are 100dyne , 10 cm/s and 500 ergs
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Explanation:
F = 100 dyne = [MLT-2]
V = 10 cm
s-1 = [LT-1]
E = 400 ergs = [ML2T-2]
L = [ML2T-2]/[MLT-2]
= [E]/[F] = 400/100 L = 4 cm
[LT-1] = 10 ⇒ 4T-1 = 10 ⇒
T = 0.4 sec [MLT-2] = 100 ⇒
M 4 × (0.4)-2 = 100 ⇒ M = 4
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