Question

An object weighing 450 kg moving with a velocity of 15 m/s. Then the kinetic energy is calculated as

Answer 1

Given:-

• Mass of the body ,m = 450 Kg

• Velocity ,v = 15m/s

To Find:-

• Kinetic Energy ,KE

Solution:-

As we know that Kinetic Energy is defined as the energy possessed due to its motion.

• KE = 1/2mv²

Substitute the value we get

→KE = 1/2×450×15²

→ KE = 225 × 15 × 15

→ KE = 225 × 225

→ KE = 50625 J

→ KE = 50.625 KJ

Therefore, the kinetic energy is 50.625 KiloJoules.

Answer 2

$\bigstar$ Given

Mass = 450 kg

Velocity = 15 m/s

$\bigstar$ To Find

Kinetic energy

$\bigstar$ Solution

We know that

$\red{\sf \longrightarrow KE=\dfrac{1}{2}mv^{2}}$

Here

• KE = Kinetic energy
• m = Mass
• v = Velocity

Units

• KE = Joule (J)
• m = kilogram (kg)
• v = metre per second (m/s)

According to the question

We are asked to find kinetic energy

Therefore

We must find "KE"

Given that

Mass = 450 kg

Velocity = 15 m/s

Hence

• m = 450 kg
• v = 15 m/s

Substituting the values

We get

$\orange{\sf \longrightarrow KE=\dfrac{1}{2} \times 450 \times 15^{2} \ J}$

$\purple{\sf \longrightarrow KE=\dfrac{1}{2} \times 101250 \ J}$

Therefore

$\pink{\sf \longrightarrow KE=50625 \ J}$

Hence

$\checkmark$ Kinetic energy = 50625 J