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vodka [1.7K]
3 years ago
13

An automobile moving at 20m/s slows to a stop in 6.5 seconds.Find the acceration of the car.

Chemistry
1 answer:
madam [21]3 years ago
8 0

Answer:

-3.1 m/s²

Explanation:

Given data

  • Initial speed (v₀): 20 m/s
  • Final speed (vf): 0 m/s (the automobile stops)
  • Elapsed time (t): 6.5 seconds
  • Acceleration (a): to be determined

We can determine the acceleration of the automobile using the following kinematic expression.

a = Δv / t

a = vf - v₀ / t

a = (0 m/s - 20 m/s) / 6.5 s

a = -3.1 m/s²

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Gwar [14]

Answer:

<h2>The answer is 2.52 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass of object = 15.9 g

volume = final volume of water - initial volume of water

volume = 56.3 - 50 = 6.3 mL

It's density is

density =  \frac{15.9}{6.3}  \\  = 2.523809...

We have the final answer as

<h3>2.52 g/mL</h3>

Hope this helps you

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