Question

formula 0.5 points
calculate the kinetic energy of a 1.375 kg car driving at 17.5 m/s.
report your answer to 1 decimal place. your permitted error is ±0.1 j. do not put units into the answer field.
answer

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 values

Given $m = 1.375$ kg and $v = 17.5$ m/s. Substitute into the formula: $K=\frac{1}{2}\times1.375\times(17.5)^{2}$.
First, calculate $(17.5)^{2}=306.25$.
Then, $\frac{1}{2}\times1.375\times306.25 = 0.6875\times306.25$.
$0.6875\times306.25 = 210.9765625$.

Step3: Round the result

Round to 1 decimal place. $210.9765625\approx211.0$.

Answer:

$211.0$