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Maru [420]
4 years ago
14

An object is shot vertically upward into the air with a positive initial velocity. What correctly describes the velocity and acc

eleration of the object at its maximum elevation?
Velocity Acceleration
(A) Positive Positive
(B) Zero Negative
(C) Positive Negative
(D) Zero Zero
(E) Negative Negative
Physics
2 answers:
SashulF [63]4 years ago
8 0

Answer:

B

Explanation:

Have a great day!

GREYUIT [131]4 years ago
3 0

Answer:

option (B)

Explanation:

According to the vector analysis, the upward direction is taken as positive and the downward direction is taken as negative.

Similarly, the rightward direction is taken as positive while the leftward direction is taken as negative.

As the object is hot vertically upwards so the direction of velocity is taken as positive as given in the question.

At the maximum height, the velocity is zero.

The acceleration acting on the object is acceleration due to gravity which is always acting downwards so it is taken as negative.

Thus, option (B) is true.

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in a lab, resonance tubes are used to determine experimentally the speed of sound. using the data given, evaluate the best appro
jek_recluse [69]

The approximate speed of sound is about 761 mph or 335.28 meters/second.

<h3>What's the approximate speed of sound?</h3>

If we consider the normal atmosphere at sea level, the speed of sound is about 761 mph or 335.28 meters/second. The speed of sound is different in different mediums such as solid and liquid.

So we can conclude that the approximate speed of sound is about 761 mph or 335.28 meters/second.

Learn more about speed here: brainly.com/question/4931057

#SPJ1

3 0
2 years ago
If a book is knocked off a desk that is .75 m tall at a rate of 2.0 m/s, how far away from the desk does it fall
ANEK [815]

Answer: 0.8 m

Explanation:

In the vertical direction, the speed is zero, u = 0.

Distance covered in the vertical direction, s = 0.75 m.

The book would fall with acceleration due to gravity in the vertical direction, a = g = 9.8 m/s²

From the equation of motion,

s = u t + 0.5 a t²

Substituting the above values, we will find out the time taken for the book to hit the ground.

⇒0.75 m=0+0.5×9.8 m/s²×t²

⇒t = √0.153 = 0.39 s ≈ 0.40 s

Now, the horizontal distance covered,

d = v×t ⇒d= 2.0 m/s × 0.40 s =0.8 m

Hence, the book falls 0.8 m away from the desk.


7 0
3 years ago
An instrument is defective for all of the following conditions EXCEPT:_______
NARA [144]

Answer:

I believe its C

6 0
4 years ago
A college student likes to take her books to class by placing them in a box and pulling the box around behind her. She pulls on
just olya [345]

Answer:

It would result an a negatice answer.

Explanation:

The accelarion should be pulled as a kite not a box :) columbus said that musical stuff no just no

Hope this helps!!

       - Katty queen

             

8 0
3 years ago
The weight of a body floating in a liquid is​
djverab [1.8K]

Answer:

The apparent weight is the weight of the body minus the weight of the liquid displaced. The body will float only when both the weights are same. In this case, the given body of weight W is floating and hence the apparent weight is zero.

4 0
3 years ago
Read 2 more answers
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