80 km per hour i believe. i’ll admit i’m american so we don’t use km lol, but the math should be the same. total distance = 120km, and total time = 1.5 hours. 120/1.5 = 80.

3 0

2 years ago

g A wheel of diameter 8.0 cm has a cord of length 6.0 m wound around its periphery. Starting from rest, the wheel is given a con

sveticcg [70]

To solve this problem it is necessary to apply the equations related to the description of the tangential and angular movement.

The displacement where the speed and acceleration is related is given by the equation:

$x = v_0t+\frac{1}{2}at^2$

Where

$v_0 =$ Initial velocity (0 because start from rest)

t = time

a = Acceleration

We have angular acceleration but not tangential acceleration. Tangential acceleration can be obtained through the relationship

$a = r\alpha \rightarrow r = \frac{diameter}{2}$

$a = \frac{0.08}{2}(3)$

$a = 0.12m/s^2$

And we have also that the displacement is

$x = 6m$

Now replacing,

$x = v_0t+\frac{1}{2}at^2$

$6 = 0*t+\frac{1}{2}(0.12)t^2$

$6 = \frac{1}{2}(0.12)t^2$

$t = 10s$

Therefore will take the cord to unwind around 10s

7 0

2 years ago

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How many days does it take for the moon to orbit the earth

valentina_108 [34]

Answer: 27 Days

Explanation:

8 0

2 years ago

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