Juan's dog Rolo likes to pull him on his skateboard in the neighborhood after school. Juan would like to design an investigation to calculate the
difference in the amount of force needed for the dog to pull him on the skateboard
What factors must Juan consider in his plan to ensure he can accurately demonstrate the relationship between force and mass? Select three
correct answers
Juan must consider how he will control his and his brother's masses to ensure
they are equal.
Juan must consider the surface that the skateboard rolls over to control friction
for each trial.
Juan must consider how he will ensure constant speed of the skateboard for
each trial.
Juan must consider how he will measure force exerted by he and his brother on
the skateboard
Juan must be able to calculate the force the dog must exert to overcome the
mass of Juan and the skateboard.