Variables

  1. independent: diameter
  2. dependent: depth of the hole
  3. control: height of drop, balls of the same material

Materials

boss
stand
clamp
ramp
meter rule
ray with sand

Method

  1. Prepare the set-up as in the diagram
  2. Measure the diameter of a ball
  3. Put the ball at the top of the ramp and let it go
  4. use a meter rule to measure the depth of the hole
  5. repeat steps 3 and 4, at least three times and take average (make sure to level the sand before to a new drop)
  6. repeat steps 1 to 5 by using 4 more balls of different size

Data table

ball number diameter/cm hole depth1/cm hole depth2/cm hole depth3/cm hole depth avr/cm
1
2
3
4
5

Safety

wear safety goggles
wear closed toe shoes

Conclusion

By comparing the data from the table if the range changes with the angle then I can conclude that the [D.V.] changes with [I.V.]