9. Work & Energy

At room temperature, an oxygen molecule, with mass of 5.31 x 10⁻²⁶ kg, typically has a kinetic energy of about 6.21 x 10⁻²¹ J . How fast is it moving?

Which of the following best defines $\mathrm{mechanical} \mathrm{energy}$?

Which of the following is the best estimate for Arizona's average continuous power consumption (in $W$) over one year?

Which term describes the energy an object possesses due to its motion?

Which two main forms of mechanical energy are commonly identified in physics?

Which of the following variables directly determine the amount of kinetic energy an object has according to the formula $K=\frac{1}{2}m{v}^2$?

Which of the following best describes $\mathrm{kinetic} \mathrm{energy}$?

When an object is in motion, what type of energy does it possess?

Which branch of physical science is most concerned with studying nonliving matter and $\mathrm{energy}$?

How are $K$ (kinetic energy) and $U$ (potential energy) different?

In the context of simple machines, how can a machine multiply force without increasing the total work done?

Which of the following lists the three main factors that determine an object's mechanical energy?

If a moving car experiences an increase in $kinetic energy$, which of the following must be true?