Question

question 1 of 10 you launch a model rocket that has a mass of 1.5 kg. at a height of 300 m it is traveling at 125 m/s. what is its kinetic energy at this point? a. 11,719 j b. 94 j c. 78 j d. 23,438 j

Explanation:

Step1: Recall kinetic - energy formula

The formula for kinetic energy is $K = \frac{1}{2}mv^{2}$, where $m$ is the mass and $v$ is the velocity.

Step2: Substitute given values

Given $m = 1.5\ kg$ and $v = 125\ m/s$. Substitute into the formula: $K=\frac{1}{2}\times1.5\times(125)^{2}$.
First, calculate $(125)^{2}=125\times125 = 15625$.
Then, $\frac{1}{2}\times1.5\times15625=0.75\times15625 = 11718.75\approx11719\ J$.

Answer:

A. 11,719 J