Question

Calculate the kinetic energy of a body mass 20kg movingwith a velocity of 3mls

Answer 1

kinetic energy = (1/2)* M*V^2 = 0.5*20*9=90J

Answer 2

Given:

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

To Find:

• Kinetic energy

Formula Used:

$\\ \bigstar{\underline{\boxed{\sf\pink{E_{k} = \dfrac{1}{2} MV^2 }}}}$

Solution:

According to the Formula,

After putting the values;

➣ E.k = ½ × 20 × (3)²

➣ E.k = ½ × 20 × 3 × 3

➣ E.k = 90 J

Hence,

The Kinetic energy is 90 joules.

Remarks:

• E.k = Kinetic energy
• M = Mass
• SI unit of Kinetic energy is Joules.