Question

17. Find the kinetic energy of a particle of mass 20 kg moving with velocity 3−5+4 m/s.

Answer 1

Answer:

kinetic energy= 360 Joule

Answer 2

The Kinetic Energy of the particle is 40 joules.

Explanation:

Given Data

Mass of the Particle = 20 kg

Velocity of the particle  = (3-5+4) m/s

Find the Kinetic energy of the Particle

Velocity of the particle = (3-5+4)

Velocity of the particle = 3 - 1

Velocity of the particle = 2 m/s

The energy possessed an object when it is in motion is called the Kinetic Energy.

Kinetic energy is equal to the product of the mass and square of the velocity divided by two.

$\text{Kinetic energy} = \frac{1}{2} \text{mv}^2 \ \ \text{(Joule)}$

Substitute the respective values in above equation

$\text{Kinetic energy} = \frac{1}{2} [20 \times (2)^2] \ \ \text{(Joules)}$

$\text{Kinetic energy} = \frac{1}{2} [20 \times 4] \ \ \text{(Joules)}$

$\text{Kinetic energy} = \frac{1}{2} [80] \ \ \text{(Joules)}$

$\text{Kinetic energy} = 40 \ \ \text{(Joules)}$

The Kinetic energy of the particle with mass 20 Kg and velocity 2 m/s is 40 joules.

To Learn More

1) An object of mass 80 kg moving with velocity 2 ms hit by collides with another object of mass 20 kg moving with velocity 4 ms. Find the loss of energy assuming a perfectly inelastic collision

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2) A particle of mass 2kg is moving along a straight line if the magnitude of its linear momentum is 2kg ms then it's kinetic energy

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