Question

# 1.If a car's speedometer indicates a constant speed of 30 miles per hour, can it be...

1.If a car's speedometer indicates a constant speed of 30 miles per hour, can it be
say that the car is not accelerating?
2. Describe an example of something that has constant speed and at the same time a
variable speed. Can you describe an example of something that has a constant speed

3.Describe an example of a body experiencing acceleration when traveling rapidly
constant. Is it possible to describe an example of a body under-acceleration traveling
at constant speed? Explain.
4. Can an object increase its speed if its acceleration decreases? If so, give an example. If not, explain.

5. Can you have zero speed and nonzero average acceleration? And acceleration
zero and non-zero speed? Explain, using a graph vx versus t and give an example
of that movement.
6. If the initial position and speed of a vehicle are known and acceleration is recorded
at every moment, can its position be calculated after a certain time with this data?
If you can, explain how.

7. Galileo studied uniform acceleration by rolling a series of
inclined ramp balls. It noted that a ball starting from rest would travel 1, 3, 5, 7, 9, etc.
units away for successive equal time intervals. Explain that this
observation is consistent with the budget that there is constant acceleration.

8. You throw a ball vertically upwards, the magnitude of the acceleration of the ball, in
each of the following moments is greater than g, of the same magnitude as g, less
g or zero? Explain.
a) Just after leaving your hands
b) At its maximum height
c) Before touching the ground.

9. From the roof of a skyscraper, you throw a ball vertically upwards with
rapidest v0 and a ball directly down quickly v0. a) Which ball has the greatest
rapid when it reaches the ground? b) Which one gets to the ground first? c) Which one has a greater
displacement when it reaches the ground? d) Which travels the longest distance when it reaches the
floor?

10. Demonstrate the following. a) As long as the effects of air may be disregarded, if
is throwed vertically upwards it will have the same speed when it returns to the point of
launch that when released. b) The flight time will be twice the upload time.

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