Question

a player kicks A ball of mass 0.5 kg placed at at the centre of a field the ball leaves with the speed of 8 metre per second the kinetic energy of ball​

Answer 1

Answer:

• 16 joules

Explanation:

Given that,

A player kicks a ball of mass 0.5kg.

And, the ball leaves with a velocity of 8m/s

Calculate the Kinetic energy.

Kinetic energy of the ball is calculated by :-

Kinetic energy = ½ • m • v²

Where,

• m(mass) = 0.5kg
• v(velocity) = 8m/s

Substituting the given values,

→ ½ • 0.5 • (8)²

→ 0.5 • 64

→ ½ • 64

→ 16 joules

Hence, the Kinetic energy of the ball is 16 joules.

_____________________

Formula used :

• Kinetic energy = ½ × m × v²

S. I. unit of Kinetic energy = joules.

Answer 2

Answer:-

• Mass=m=0.5kg
• Velocity=v=8m

We know that

$\boxed{\sf Kinetic\:energy=\dfrac{1}{2}mv^2}$

$\\ \sf\longmapsto Kinetic\:Energy=\dfrac{1}{2}\times 0.5\times 8^2$

$\\ \sf\longmapsto Kinetic\:Energy=\dfrac{1}{2}\times 0.5\times 64$

$\\ \sf\longmapsto Kinetic\:Energy=0.5\times 32$

$\\ \sf\longmapsto Kinetic\:Energy=16J$