Name the unit of physical quantity obtained by the formula \frac{2 K}{v^2}. Where K : kinetic energy, v: Linear velocity.

ICSE Class 10 Physics 2018 Solved Paper - Question 10

Question : 10 of 78

Marks: +1, -0

Name the unit of physical quantity obtained by the formula

\;{2 K}/{v^2}

. Where

K

: kinetic energy,

v :

Linear velocity.

Solution:

The given expression

\;=\;{2 K}/{v^2}

\;=\;{2 × {1}/{2} m v^2}/{v^2} ( ∵ K=\;{1}/{2} m v^2)

\;=m \;\text " (i.e. mass) "\;

The unit of mass is

{\kg}

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