Question

what is the kinetic energy of a 5kg ball that is rolling 2m/2.​

Answer 1

Answer:

10joule

Explanation:

1. we know that kE = 1/2mv^2
2. 1/2×5×2^2
3. 1/2×20=
4. 10joule

Answer 2

Given: The mass and velocity of a ball are 5kg and 2m/s respectively.

Need to find: The kinetic energy (K.E) of the ball.

⠀⠀━━━━━━━━━━━━━━━━━━━━━━━━⠀⠀⠀⠀

As we know that,

⠀

$\quad\:\red{\star}\:\:\:\underline{\boxed{\frak{\pink{\:K.E = \dfrac{1}{2}mv^2\:}}}}$

⠀

This implies, "the kinetic energy is directly proportional to the mass of the body."

⠀

Now, substituting the given values in the formula, we get:

⠀

$\sf{:\implies K.E = \dfrac{1}{2} \times 5 \times (2)^2} \\\\\\ \sf{:\implies K.E = \dfrac{1}{2} \times 5 \times 4} \\\\\\ \sf{:\implies K.E = 1 \times 5 \times 2} \\\\\\ \sf{:\implies \underline{\boxed{\frak{\purple{K.E = 10}}}}}$

⠀

∴ Thus, the kinetic energy (K.E) of the ball is 10 Joule.