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Vsevolod [243]
4 years ago
5

A velocity vs. time graph is shown.

Physics
1 answer:
Scilla [17]4 years ago
8 0

Answer:

Acceleration, a=4\ m/s^2

Explanation:

We are given with a velocity-time graph of an object that starts from origin. y axis is velocity and x-axis is time.

The slope of velocity-time graph gives acceleration of an object. Taking the slope of this graph.

m=\dfrac{v}{t}\\\\m=\dfrac{20\ m/s}{5 s}\\\\m=\text{acceleration}=4\ m/s^2

So, the acceleration of the object is 4\ m/s^2.

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We have that the density of the fluid is

\rho_f=178.57  kg/m3

From the question we are told that

object of volume 0.0004m^3

density 6000kg/m^3

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Force F=0.7N

Generally the equation for the Force   is mathematically given as

F= v*\rho_f*g\\\\0.7= 0.0004*\rho_f*9.8\\\\\rho_f=\frac{0.7}{0.0004*9.8}

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Calculating ph how is ph related to the concentration of hydronium ions. True or False
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3 years ago
A rock falls for 1.43 seconds how far did it fall? The falls's velocity is an acceleration of -9.81 m/s2
BartSMP [9]

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s = -0.100 \  m

Explanation:

Generally from kinematics equations we have that

          s = ut + \frac{1}{2}gt^2

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substituting 1.43 s for t and -9.8m/s^2 for g we have that

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=>     s = -0.100 \  m

The negative sign show that the displacement is in the direction of the negative y-axis

 

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A

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