Practice problems

Here are two more practice problems for the equations of motion:

1.  A car starts from rest and accelerates at 5 m/s/s.  After 8 seconds of continual acceleration:

a.  how fast is it moving?
b.  how far has it gone?

(40 m/s, 160 m)

2.  This one may require a bit of algebra.  If you were to drop a ball (from rest) from a 50-m tall tower, find:

a.  how long it takes to hit the ground?
b.  how fast it will be traveling right before it hits?

(3.19 seconds, 31.3 m/s)

Don't forget to review the new lab stuff, too!  (It is just below this on the blog.)

Also, answers to the recent quiz:

1.  3.65 days
2.  approx. 9, 612,173
3.  on the order of 140 million (or somewhere in the 10^8 range)
4.  27,273