Select forms of kinetic energy A Running Running B A pendulum at its highest point Molecules vibrating D A chemical reaction

## Step 1<br />Kinetic energy is the energy that an object possesses due to its motion. This energy is dependent on the speed of the object and its mass. The formula for kinetic energy is:<br />### \( KE = \frac{1}{2}mv^2 \)<br />where \( m \) is the mass of the object and \( v \) is the velocity of the object.<br /><br />## Step 2<br />Looking at the options, we can see that option A, "Running", involves motion, hence it is a form of kinetic energy.<br /><br />## Step 3<br />Option B, "A pendulum at its highest point", is not a form of kinetic energy because at this point, the pendulum is at rest and its velocity is zero. Therefore, it has potential energy, not kinetic energy.<br /><br />## Step 4<br />Option C, "Molecules vibrating", involves motion, hence it is a form of kinetic energy.<br /><br />## Step 5<br />Option D, "A chemical reaction", does not necessarily involve motion. While there may be movement of particles during a chemical reaction, the reaction itself is not a form of kinetic energy.