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linglingpopo

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**2) Starting from rest, a car accelerates at 6 m/s2 for 5 s, then continues at a constant velocity for 10 s, then decelerates at -1m/s2.**

How fast was it going 0.70 km from where it started?

How fast was it going 0.70 km from where it started?

So, a=6m/s2

t= 5 s

ty= 10s

ay= -1m/s2

.70km converted to m is 700m

Where do I go and did I even set it up right? What equations do I use? I know I'm solving for the initial velocity.

**3) A car driving straight off a 10m high cliff lands 20 m away. If the cliff had been 30 m high instead of 10 m, how far away would it have landed?**

Looking for displacement on this one

So x= 10m

y= 20 m

Do you use pythagorean theorem or try to find v or what? :(

4) Car A and Car B are traveling at constant velocities in the same direction on the highway. Car A passes Car B at 3:07:00 pm. At 3:08:00 pm Car A starts to decelerate at -1 m/s2. At 3:09:00pm Car B passes Car A.

How much faster was Car A driving than Car B when they first met?

4) Car A and Car B are traveling at constant velocities in the same direction on the highway. Car A passes Car B at 3:07:00 pm. At 3:08:00 pm Car A starts to decelerate at -1 m/s2. At 3:09:00pm Car B passes Car A.

How much faster was Car A driving than Car B when they first met?

...this one I just don't get. I don't even know how to attempt it