Abigail roller skates with a constant speed of 12km/h. how long will she take to travel a distance of 15 kilometers?

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2