Question

A baseball with a mass of 0.15 kg is moving at a speed of 40 m/s. What isthe kinetic energy from this motion? (hint: K.E. = 1/2 m v2 or KE= (0.5)(m)v2Kinetic & Potential EnergyKE = 1/2mV² PE = mghQuick & Simple!O 120 J1200 JO 6JO 80 J

Answer 1

Kinetic Energy of a body is given by,

$\begin{gathered} K.E.=\frac{1}{2}mv^2 \\ Where, \\ K.E.=Kinetic\text{ }Energy \\ m=Mass \\ v=Velocity\text{ }or\text{ }Speed \end{gathered}$

So,

$\begin{gathered} Here; \\ m=0.15kg;\text{ }v=40\text{ }m\text{/s} \\ So, \\ K.E.=\frac{1}{2}\times0.15\times(40)^2=120J \end{gathered}$

So, the kinetic energy of baseball is 120 Joule.

So 1st option is correct option.