Question

what is the kinetic energy of 60 kg mass moving with a velocity 40 m/s ​

Answer 1

Answer :

Mass of body = 60kg

Velocity of body = 40m/s

We have to find kinetic energy of body$.$

◈ Kinetic energy of body of mass m moving with velocity v is given by

• KE = 1/2 × mv²

Energy is a scalar quantity having only magnitude.

SI unit : Joule (J)

➝ KE = 1/2 × mv²

➝ KE = 1/2 × 60 × (40)²

➝ KE = 30 × 1600

➝ KE = 48,000J = 48kJ

፨ God Bless ☃

Answer 2

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✤ Required Answer:

✒ GiveN:

• Mass of the body = 60 kg
• Velocity of the body = 40 m/s

✒ To FinD:

• Kinetic energy of the body....?

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✤ How to solve?

Kinetic energy is the energy possessed by the body on virtue of its motion. Here, we also use velocity in order to find kinetic energy. It is given by,

$\large{ \boxed{ \rm{KE = \frac{1}{2} m {v}^{2} }}}$

Here,

• KE = Kinetic energy
• m = mass of the body
• v = velocity of the body

⚘ So, Let's solve this question.....

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✤ Solution:

We have,

• m = 60 kg
• v = 40 m/s

By using formula,

➝ KE = 1/2 × mv²

➝ KE = 1/2 × 60 × 40² kg m²/s²

➝ KE = 30 × 40 × 40 kg m²/s²

➝ KE = 48000 kg m²/s²

Since, units of mass and velocity is given in SI system, in the system the unit of Energy is known as Joule(J)

➝ KE = 48,000 J

☃️ Hence, KE of the body = 48,000J

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