What is the precision for each measurement for the online simulation. What would be the precision for force

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?