An object falls because of gravity at a rate of -980 cm/s2 (- sign is indicative of a downward direction) for 10. seconds. if it starts from rest (vo = 0) and its position starts from do= 0.0, where is it 10. seconds later?
-4900
-49
-490

i got u kaitlyn im sorry its so late but the answer is -490

Explanation:

Here is another example. How fast (that is, what velocity) is the rock falling off the cliff after 1.0 s? 2.0 s? or 10. s?

This particular problem is looking for the velocity of the object, and you know that the rock is falling due to gravity.

v = gt is the best formula to use.

Then, v = -9.8 m/s2 x 1.0s or 2.0s or 10.s

v = - 9.8 m/s, - 20 m/s (rounded due to significant figures), and -98 m/s respectively.