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inessss [21]
3 years ago
10

A car traveling at 28 m/s starts to decelerate steadily. It comes to a complete stop in 7 seconds. What is its acceleration?

Mathematics
2 answers:
In-s [12.5K]3 years ago
6 0
The car's acceleration can be modeled by the following formula:

a = \frac{v_f - v_i}{t}

vf represents the final velocity of the car. vi represents the initial velocity of the car. t represents the total time it took for the car to get from its initial to its final velocity.

We already have our values for our velocities and time. Plug them into the equation:

\text{Initial velocity: 28 m/s}^{2}
\text{Final velocity: 0 m/s}^2
\text{Time: 7 seconds}

\frac{0-28}{7} = -\frac{28}{7} = \boxed{-4}

The acceleration of the car is -4 m/s, or -4 meters per second.
Alika [10]3 years ago
5 0
The function that models the scenario is
v = init_v + acceleration * time

Plug the values into the equation,
0 = 28 + a * 7 => -28 = a * 7 => a = - 28/7 m/s.
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6 0
3 years ago
Pablo has completed 44 deliveries so far this week. He needs to make 55 deliveries for the week. What
Dennis_Churaev [7]

Answer:

<h2>80%</h2>

Step-by-step explanation:

step one:

completed delivery = 44

total delivery to be made= 55

Step two

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the formula is

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=0.8*100

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2 years ago
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Answer:

Step-by-step explanation:

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7 0
2 years ago
Will give brqinlist if correct
BARSIC [14]

Answer:

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=> -11 + 8x -2 + 6

=> -13 + 8x + 6

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So, the simplified expression is 7 + 8x.

5 0
3 years ago
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Step-by-step explanation:

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