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avanturin [10]
3 years ago
10

A car is traveling at 35.8 m/s. What acceleration would it have if it took 2.0 s to come to a complete stop?

Physics
1 answer:
nasty-shy [4]3 years ago
4 0

Answer:

\boxed {\boxed {\sf a= -17.9 \ m/s^2}}

Explanation:

Acceleration is equal to the change in velocity over the change in time.

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

The initial velocity is 35.8 meters per second. The final velocity is 0 meters per second when the car comes to a complete stop. The time is 2.0 seconds.

v_f= 0 \ m/s \\v_i= 35.8 \ m/s \\t= 2  \ s

Substitute the values into the formula.

a=\frac{0 \ m/s - 35.8 \ m/s }{2 \ s}

Solve the numerator.

a= \frac{ -35.8 \ m/s} {2 \ s}

Divide.

a= -17.9 \ m/s/s = -17.9 \ m/s^2

The car's acceleration is <u>-17.9 meters per square second.</u> The acceleration is negative because the car was coming to a stop and slowing down.

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schepotkina [342]
I don't actually understand what your question is, but I'll dance around the subject
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-- The effect of gravity is:  There's a <em>pair</em> of forces, <em>in both directions</em>, between
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-- The strength of the force depends on the <em>product</em> of the masses, so it doesn't matter whether there's a big one and a small one, or whether they're nearly equal. 
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-- The strength of the forces also depends on the distance between the objects' centers.  More distance => weaker force.  Actually, (more distance)² ==> weaker force.

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-- When you (or a ball) are up on the roof and step off, the force of gravity that pulls
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--  This works exactly the same for every pair of masses in the universe.  Gravity
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7 0
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Explanation:

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