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koban [17]
3 years ago
11

If the acceleration of an object is zero at some instant in time, what can be said about its velocity at that time? 1. It is neg

ative. 2. It is positive. 3. It is not changing at that time. 4. Unable to determine. 5. It is zero.
Physics
1 answer:
Mkey [24]3 years ago
5 0

3. It is not changing at that time

Explanation:

If the acceleration of a body is zero at some instant in time, it implies that the velocity is not changing at that point in time. Velocity is the rate of change of displacement with time.

✓Acceleration and velocity shares a very close relationship.

✓ For a body to accelerate, the velocity must change. Acceleration is defined as the rate of change of velocity with time.

✓If at any point, a body moves with constant velocity i.e the velocity does not change with time, the acceleration becomes zero.

✓ For acceleration to occur, a body must change velocity.

Learn more:

Acceleration brainly.com/question/6323625

#learnwithBrainly

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What water pressure must a pump that is located on the first floor supply to have water on the thirteenth of a building with a p
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The water pressure on the first floor must be 455 PSI in order to push the water to the 13th floor at the given pressure.

The given parameters;

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The vertical pressure of the water is calculated as follows;

P = \rho gh\\\\\frac{P}{h} = \rho g\\\\\frac{P}{h} = k\\\\\frac{P_1}{h_1} = \frac{P_2}{h_2} \\\\

The vertical height of the first floor from the 13th floor = 130 ft

The vertical height of the 13 ft floor = 10  ft

P_1 = \frac{P_2 h_1}{h_2} \\\\P_1 = \frac{35 \times 130}{10} \\\\P_1 = 455 \ PSI

Thus, the water pressure on the first floor must be 455 PSI in order to push the water to the 13th floor at the given pressure.

Learn more about vertical height and pressure here: brainly.com/question/15691554

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2 years ago
Sohan said to Geeta I have done my work change the following sentence into indirect​
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Sohan told Geeta that i had done my work

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A fountain sends a stream of water straight up into the air to a maximum height of 5.60 m. The effective area of the pipe feedin
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