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3 years ago

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Importance of a measurement at least 4 point

1 answer:

Annette [7]3 years ago

7 0

Answer:

A measurement is the action of measuring something, or some amount of stuff. So it is important to measure certain things right, distance, time, and accuracy are all great things to measure. Measurements can also allow us to make desicions based on the outcome of the measurement.

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Which is the correct answer ?

hodyreva [135]

D ............................

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A 1090 kg car has four 12.7 kg wheels. When the car is moving, what fraction of the total kinetic energy of the car is due to ro

max2010maxim [7]

Answer:

$\frac{KE_{Rotational}}{KE_{Total}} = 0.018$

Explanation:

To develop this exercise we proceed to use the kinetic energy equations,

In the end we replace

$KE_{Total}=KE_{Translational}+KE_{Rotational}$

$KE_{Total}=\frac{1}{2}m_{car}+4*\frac{1}{2}*I*(\frac{v}{r})^2$

Here

$I=\frac{1}{2}m_{wheels}*r^2$ meaning the 4 wheels,

So replacing

$KE_{Rotational}=4\frac{1}{2}*(\frac{1}{2}m_{wheels}*r^2)*(\frac{v}{r})^2=m*v^2$

So,

$\frac{KE_{Rotational}}{KE_{Total}} = \frac{m_{wheels}*v^2}{\frac{1}{2}m_{car}*v^2+m_{wheels}*v^2}$

$\frac{KE_{Rotational}}{KE_{Total}} = \frac{m_{wheels}}{\frac{1}{2}m_{car}+m_{wheels}}$

$\frac{KE_{Rotational}}{KE_{Total}} = \frac{10}{545+10}$

$\frac{KE_{Rotational}}{KE_{Total}} = 0.018$

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3 years ago

Where is the value of kinetic energy equal to zero

bearhunter [10]

Answer:

if the object is not in motion

Explanation:

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A 500-kilogram sports car accelerates uniformly from rest, reaching a speed of 30 meters per second in 6 seconds. What distance

umka2103 [35]

Answer:

reaching a speed of 30 meters per second in 6 seconds.

During the 6 seconds, the car has traveled

a distance of

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2. 60 m

3. 15 m

4. 30 m

5. 90 m

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Suppose the electric field between two parallel plates kept constant but the distance between them is tripled. What happens to t

alukav5142 [94]

Answer:

The voltage increases by a factor of three.

Explanation:

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