Question

An object with a mass of 20 kg is moving at a speed of 3 m/s. What is the kinetic energy of the object?

Answer 1

`\huge{ \boxed{ \bold{ \sf{90 \: joule}}}}`

✑ First , Let's know what kinetic energy is :

⇾ The energy possessed by a body by the virtue of it's motion is called kinetic energy of the body. A flying bird , a moving car , running water , wind , a bullet fired from a gun , an arrow left from a bow , rolling stone etc are some examples of kinetic energy.

The Kinetic energy of a moving body is determined by the formula :

`\boxed{ \underline{ \sf{KE= (1)/(2) m {v}^(2) }}}`

Here ,

• m = mass of the body
• v = velocity of the body

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☇ Now , Let's solve :

☄ Given :

• Mass of the object ( m ) = 20 kg
• Velocity of the object ( v ) = 3 m/s

☄ To find :

• Kinetic energy of the object

⤿
`\boxed{ \sf{KE= (1)/(2) m {v}^(2) }}`

Plug the values and simplify :

→
`\sf{ (1)/(2) * 20 * {(3)}^(2) }`

→
`\sf{ (1)/(2) * 20 * 9}`

→
`\boxed{ \bold{\sf{90 \: joule}}}`

Hope I helped !

Have a wonderful day ! ツ

~TheAnimeGirl ♡