Originally Posted by lkerry 1) A meteor experiences increased speed as it gets nearer to the earth is it acceleration?
2) a ball hurts much more when it hits close up than further away is it force?
3) tom's maintains the same speed after turning the corner on his roller skates is it velocity?
4) jan's toy doll moves about 2m every 30 secondsis it speed?

1), 3), and 4): An object is accelerating if and only if it's velocity is changing. Note that this can be a change in speed, a change in direction, or both. So for 1) the speed is increasing, etc. For 4) note that the question says the doll moves "about" 2 m every 30 s. This implies that the speed is changing, so it must be accelerating. I'll let you do 3).
2): I should call this an "air resistance" problem, though I'm not certain that the question is addressing this. Anyway, if it hurts more, then we may say that the speed of the ball is higher for a closein impact than it is farther away, so the change in momentum is larger, hence the impluse the ball transmits is larger, and thus the average force it hits with is greater. (We can say all this using the impulse momentum theorem.)
Dan