Four students are told to determine the time taken for a ball bearing to drop through a vertical distance of $1.0\,\text{m}$. Each student carries out a different method. Which student carries out the correct method?
- AThe student measures the time taken for the ball to fall $1.0\,\text{m}$ five times. He then adds the times taken together and divides by five.
- BThe student measures the time taken for the ball to fall $1.0\,\text{m}$ five times. He then multiplies the times taken together and divides by five.
- CThe student measures the time taken for the ball to fall $2.0\,\text{m}$. He then divides the time taken by two.
- DThe student measures the time taken for the ball to fall $2.0\,\text{m}$ five times. He then adds the times taken together and divides by ten.