- #1
physicsgal
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i have the answers.. but just want to make sure I am on the right track and didnt mix anything up.
"a cyclist rode east for 100m with a constant velocity of 25m/s. she then accelerated down a hill and 5 seconds later reached the bottom of the hill with a velocity of 50m/s."
a) how long did the cyclist ride before reaching the hill?
100/25 = 4 seconds
b) what was her average acceleration down the hill?
(50m/s -25.0 m/s)/5s
= 5 m/s ^2
*not sure if the 25 m/s should have been left out of the answer or not*
c) what was the distance she traveled down the hill?
5s * 50m/s
= 250 m
d) if she continued to ride at constant velocity for another 5s, how far beyond the hill would she travel?
5m * 25 m/s
= 125m
any help will be appreciated!
~Amy
"a cyclist rode east for 100m with a constant velocity of 25m/s. she then accelerated down a hill and 5 seconds later reached the bottom of the hill with a velocity of 50m/s."
a) how long did the cyclist ride before reaching the hill?
100/25 = 4 seconds
b) what was her average acceleration down the hill?
(50m/s -25.0 m/s)/5s
= 5 m/s ^2
*not sure if the 25 m/s should have been left out of the answer or not*
c) what was the distance she traveled down the hill?
5s * 50m/s
= 250 m
d) if she continued to ride at constant velocity for another 5s, how far beyond the hill would she travel?
5m * 25 m/s
= 125m
any help will be appreciated!
~Amy