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For each of the problems below, you will need to draw a graph to find the solution.
3. A driver who is moving at 15 m/s, sees a stop light and puts on the brakes 30 m before an intersection.
a) What acceleration will the driver have to have to stop before entering the intersection?
b) How much time will it take to stop the car?

4. A boy standing on a bridge spits into the water below. He hears the splash 1.5 seconds later. How high is the bridge?

5. A ball is thrown upwards at 20.0 m/s.
a) How far has it traveled after 4.0 seconds?
b) What is its velocity at that time?

Sagot :

GalaxyPrincess22

Answer:

Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth's gravitational force as the acceleration rate of an object.

Explanation:

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