Question

If the velocity be 20cm/s-1 the unit of acceleration be 40 cm /s-2 and the unit of force be 30 dyne what are the units of mass length and the Time


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Answer 1

Answer:

Mass m = 7.5 × 10^(-4) Kg

Time t = 0.5 sec

Length l = 0.1 m = 10 cm

Explanation:

1 dyne = 1×10^(-5) N

1 dyne = 1×10^(-5) Kgm/sec

1 cm/sec^(2) = 0.01 m/sec^(2)

# Force; F = ma > a = F/m

> a = [30×10^(-5)] / [40×(0.01)]

> a = [30×10^(-5)] / [0.4]

> a = 7.5×10^(-4)

# Time; v = at > t = v/a

> t = (20×0.01) / (40×0.01)

> t = 0.5 sec

# Length; l = vt

> l = (20×0.01) × 0.5

> l = 0.1 m = 10 cm

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