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5.Work, Energy, Power and Collision
easy
$3 kg$ દળ ધરાવતા અને $2 Ns$ જેટલુ વેગમાન ધરાવતા પદાર્થની ગતિઊર્જા કેટલી હશે?
A
$1 J$
B
$\frac{2}{3}J$
C
$\frac{3}{2}J$
D
$4 J$
Solution
Given,
Mass, $m=3\,kg$
Momentum, $P = mv$
Velocity, $v =\frac{ P }{ m }=\frac{2}{3}\,ms ^{-1}$
Kinetic energy, $\frac{1}{2}\,mv ^2=\frac{1}{2} \times 3 \times\left(\frac{2}{3}\right)^2=\frac{2}{3}\,J$
Hence, kinetic energy is $\frac{2}{3}\,J$
Standard 11
Physics
