Question

you serve a volleyball at 2.1 kg. the ball leaves your hand at 30m/s. the ball has what energy

Answer 1

Correct Question:

You serve a volleyball with a mass of 2.1 kg. the ball leaves your hand at 30m/s. The Ball Has What Energy?

Answer:

The ball has a kinetic energy of = 945 Joule.

Explanation:

The energy that ball had can be evaluated using the formula of kinetic Energy, Which says that,

${ \implies \sf K}E={\sf \dfrac{1}{2}m \times v^2}$

Given:

Velocity = 30m/s

Mass = 2.1kg

Evaluating:

Putting the values in:

${ \implies \sf K}E={\sf \dfrac{1}{2} \times 2.1 \times (30)^2}$

${ \implies \sf K}E={\sf 0.5 \times 2.1 \times (30)^2}$

${ \implies \sf K}E={\sf 1.05 \times (900)}$

Kinetic Energy possessed by ball = 945 joules.

Answer 2

Answer:

The energy that ball had can be evaluated using the formula of kinetic Energy, Which says that,

${ \implies \sf K}E={\sf \dfrac{1}{2}m \times v^2}$

Given:

Velocity = 30m/s

Mass = 2.1kg

Evaluating:

Putting the values in:

${ \implies \sf K}E={\sf \dfrac{1}{2} \times 2.1 \times} \\ { \implies \sf K}E={\sf 0.5 \times 2.1 \times (30)^2}</p><p> \\ { \implies \sf K}E={\sf 1.05 \times(900)}</p><p>$

Kinetic Energy possessed by ball = 945 joules.