Question

What is the kinetic energy of a girl who has a mass of 48 kg and a velocity of 4.3 m/s.​

Answer 1

Answer:

443.76 kgm^2/s^2

Explanation:

K.E = 1/2m v^2

=1/2 ×48×4.3×4.3=443.76

Answer 2

Given:

• Mass of girl, m = 48kg
• Velocity, v = 4.3m/s

Find:

• Kinetic Energy

Solution:

we, know that

$\red\bigstar\boxed{\sf Kinetic \: Energy = \dfrac{1}{2}m{v}^{2}} \red\bigstar$

where,

• Mass, m = 48kg
• Velocity, v = 4.3m/s

So,

➨ $\sf Kinetic \: Energy = \dfrac{1}{2}m{v}^{2}$

➨ $\sf Kinetic \: Energy = \dfrac{1}{2}\times 48 \times {(4.3)}^{2}$

➨ $\sf Kinetic \: Energy = \dfrac{48}{2}\times {(4.3)}^{2}$

➨ $\sf Kinetic \: Energy = \dfrac{48}{2}\times 18.49$

➨ $\sf Kinetic \: Energy = 24 \times 18.49$

➨ $\sf Kinetic \: Energy = 443.76J$

_________________________

Hence, Kinetic Energy of a girl of mass 48kg will be 443.76J