Question

physical science a 2025 - 2026 potential and kinetic energy calculating kinetic energy a conveyor belt moves a 40 kg box at a velocity of 2 m/s. what is the kinetic energy of the box while it is on the conveyor belt? 160 j 80 j 40 j 1,600 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 $m = 40\ kg$ and $v = 2\ m/s$. Substitute into the formula: $K=\frac{1}{2}\times40\times(2)^{2}$.
First, calculate $(2)^{2}=4$. Then, $\frac{1}{2}\times40 = 20$. Finally, $20\times4=80\ J$.

Answer:

80 J