1/16 ( ignore this the stupid website just makes us use 20 characters UGH! )
A beacuse the rock starts to tear away from the water which will then create ripple marks
The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time is in seconds (s), so the units will be in metres per second (m/s).
