Question

An object of mass 15 kg is moving with a uniform velocity of 4ms-1 what is the knetic energy possessed by the object?? ​

Answer 1

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$\mapsto \sf{Mass(m) \: of \: object = 15kg}$

$\mapsto \sf{Velocity(v) \: of \: object=4m {s}^{ - 1} }$

$\large \underline{ \underline{ \frak{ \color{peru}{ᴛᴏ \: ғɪɴᴅ:}}}}$

$\leadsto \sf{Kinetic \: energy (K.E.) \: of \: object. }$

$\large \underline{ \underline{ \frak{ \color{cyan}{ғᴏʀᴍᴜʟᴀ \: ʀᴇϙᴜɪʀᴇᴅ:}}}}$

$\dag\underline { \blue{\boxed{ \red{\rm{Kinetic \: energy (K.E.) = \frac{1}{2} \times mass(m) \times {{velocity(v)}}^{2} }}}}}$

$\large \underline{ \underline{ \frak{ \color{indigo}{ᴀᴄᴄᴏʀᴅɪɴɢ \: ᴛᴏ \: ϙᴜᴇsᴛɪᴏɴ::}}}}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = \frac{1}{2} \times m \times {{(v)}}^{2} }}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = \frac{1}{2} \times 15 \times {{(4 )}}^{2} }}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = \frac{1}{2} \times 15 \times {16} }}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = \frac{1} {\cancel{2}} \times 15 \times \cancel {16} }}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = 15 \times 8}}$

${ \dashrightarrow \sf{Kinetic \: energy (K.E.) = 120J}}$

$\bf \underline{ʜᴇɴᴄᴇ,}$

$\: \: \: \: \star\underline { \red{\boxed{ \blue{\rm{Kinetic \: energy (K.E.) = 120J}}}}}$

Answer 2

Answer:

Kinetic energy possessed by the object is 120 J.

Explanation:

Given,

An object of mass = m = 15 kg

Uniform velocity = v = 4m s-¹

To find: what is the kinetic energy possessed by the object.​

Solution:

Kinetic energy is defined as the energy of the body by virtue of its motion.

Kinetic Energy is directly proportional to the square of velocity.

i.e K.E = 1 / 2 mv²

here, m = 15 kg and v = 4 m/s

Substituting values, we will get,

K.E = 1/2 * 15 * 4 * 4

K.E = 120 J

Therefore, kinetic energy possessed by the object is 120 J.