How would you use a spring balance to find the mass of an apple?

To find the mass of an Apple using a spring balance, first ensure the balance is calibrated to zero. Then, hang the Apple from the hook of the spring balance and allow it to hang freely without any additional force applied. The reading on the scale will indicate the gravitational force acting on the Apple, which corresponds to its weight. Since weight equals mass times gravity (W = mg), you can directly read the mass of the Apple from the spring balance, assuming the scale is calibrated to display mass instead of weight.