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Advocard [28]
3 years ago
5

The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s2)t - (6.2 m/s3)t2. What is the ave

rage acceleration of the particle between t = 1.0 s and t = 2.0 s (up to two significant figures) ?

A) -13 m/s2

B) -14 m/s2
C) 13 m/s2
D) 15 m/s2
E) None of the above
Physics
1 answer:
pantera1 [17]3 years ago
6 0

Answer:

average acceleration = −14.5 m/s²

so correct option is B) -14 m/s²

Explanation:

given data

v(t) = (2.3 m/s) + (4.1 m/s2)t - (6.2 m/s3)t²

t1 = 1.0 s

t2 = 2.0 s

to find out

What is the average acceleration

solution

we know that average rate of change on the interval is

average acceleration = \frac{Vf-Vi}{t2 - t1}    ............1

so here put value of t for final f and initial i

we get Vf =  2.3 + (4.1)(2) - (6.2)(2)²

and Vi = 2.3 + (4.1)(1) - (6.2)(1)²

and t2 - t1 = 2 - 1 = 1 s

put value in equation 1

average acceleration = [2.3 + (4.1)(2) - (6.2)(2)² ] - [ 2.3 + (4.1)(1) - (6.2)(1)² ]

average acceleration = −14.5 m/s²

so correct option is B) -14 m/s²

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<h2>Option C is the correct answer.</h2>

Explanation:

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Density of fluid = Specific gravity of fluid x Density of water

Density of fluid = 0.750 x 1000

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We have

         Mass = Volume x Density

         22.5 = Volume x 750

         Volume = 0.03 m³ = 30 L

Option C is the correct answer.

5 0
3 years ago
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