Question

A 2 kg ball is thrown upward with a velocity of 15 m/s. What is the kinetic energy of the ball as it is being thrown?​

Answer 1

Answer:

Given

Velocity of ball (v) = 15m/s

Mass of ball (m) = 2 kg

Find out

Kinetic energy of ball

Solution

As we know that

★ Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = ½ mv²

➠ K.E = ½ mv²

➠ K.E = ½ mv²➠ K.E = ½ × 2 × 15 × 15

➠ K.E = ½ mv²➠ K.E = ½ × 2 × 15 × 15➠ K.E = 15 × 15

➠ K.E = ½ mv²➠ K.E = ½ × 2 × 15 × 15➠ K.E = 15 × 15➠ K.E = 225 Joules

Hence,

Kinetic energy of ball is 225 Joules

Additional Information

Kinetic energy is the energy an object possesses because of its motion

Its S.I unit is Joules

Answer 2

Answer:

Given,

Mass of the ball(m)= 2 kg.

Velocity (v)= 15 m/s.

We know that,

Kinetic Energy= 1/2 × m × v^2

$= \frac{1}{2} \times 2 \times {(15)}^{2} \\ = {(15)}^{2} \\ = 225 \: kg m / {sec}^{2}$