Question

The kinetic energy of an object of mass m is moving with a velocity of 12m/s is 36 J.Find its mass.​

Answer 1

Answer:

0.5 kg

Explanation:

we know the kinetic energy formula E(k) = 1/2 mv^2

now its given that E(k)= 36 j

1/2 mv^2 = 36

move all the parameters right side of the equal

and keep m in the left side.

so, if you calculate the m will be 0.5 kg

Answer 2

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$\large \bullet \green{ \bold{ \underline{ \: answer}}}$

$\bold{the \: kinetic \: energy \: of \: an \: object \: of \: mass \: m \: is \: moving \: with \: a \: velocity \: of \: 12 \: is \: 36 \: joules \: .find \: its \: mass}$

$\: \implies \displaystyle \sf{kinetic \: energy = \frac{1}{2}m {v}^{2} }$

$\: \: \implies \displaystyle \sf{36 = \frac{1}{2} m ({12})^{2} }$

$\: \: \implies \displaystyle \sf{ \frac{72}{144} = mass}$

$\: \: \: \implies \displaystyle \sf{mass = \frac{72}{144} }$

$\: \: \implies \displaystyle \sf{mass = \cancel\frac{72}{144} = \frac{36}{72} }$

$\: \: \implies \displaystyle \sf{mass = \cancel \frac{36}{72} = \frac{1}{2} }$

$\: \: \implies \displaystyle \sf{mass = 0.5 \: kg}$

$\: \: \bigstar \boxed{ \underline{ \bf\color{blue} \: the \: value \: of \: mass \: will \: be \: 0.5 \: kg}}$