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1 year ago

How long will it take a ball to roll 10 meters along the floor at a speed of 0.5m/s

Physics

1 answer:

Julli [10]1 year ago

5 0

Answer:

Explanation:

because m/s=s/t so,

0.5m/s=10m/t

t=10m/0.5m/s

t=5sec

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A sprinter completes a 400m race (one lap around the track). Mr Borst thinks the magnitudes of her distance and displacement are

GalinKa [24]

Answer:

Explanation:

Displacement is how far between your initial and finishing position.

If one lap around the track is 400 m and the sprinter ran 1 lap around the track. Then the sprinter's distance is 400 m and their displacement is 0 m

If the sprinter ran 400 m in a straight line however, then it would be equal.

But since the sprinter ran 1 lap around there is no displacement.

I hope this helped you...

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3 years ago

Two equal charges with magnitude Q and Q experience a force of 12.3442 when held at a distance r. What is the force between two

andre [41]

Answer:

197.5072.

Explanation:

According to the Coulomb's law, the magnitude of the electrostatic force of interaction between two charges $\rm q_1$ and $\rm q_2$ which are separated by the distance $\rm d$ is given by

$\rm F = \dfrac{kq_1q_2}{d^2}.$

<em>where,</em> k is the Coulomb's constant.

For the case, when,

$\rm q_1 = Q.$
$\rm q_2 = Q.$
$\rm d=r.$
$\rm F=12.3442.$

Then, using Coulomb's law,

$\rm 12.3442 = \dfrac{kQQ}{r^2}=\dfrac{kQ^2}{r^2}\ \ \ \ .......\ (1).$

For the case, when,

$\rm q_1 = 2Q.$
$\rm q_2 = 2Q.$
$\rm d=\dfrac r2.$

Then, using Coulomb's law, the new electric force between the charges is given by,

$\rm F' = \dfrac{k(2Q)(2Q)}{\left (\dfrac r2\right )^2}\\=\dfrac{k\ 4Q^2}{\dfrac{r^2}{4}}\\=4\times 4 \times \dfrac{kQ^2}{r^2}\\=16\ \dfrac{kQ^2}{r^2}\\=16\times 12.3442\ \ \ \ \ \ \ \ (Using\ (1))\\=197.5072.$

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2 years ago

Phsyical properties are

Fantom [35]

The answer is C. Any physical property can be observed without changing the identity of the substance. That’s one of the main things that separates a physical and chemical property.

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3 years ago

Read 2 more answers

6. A resident throws a bag full of trash over the balcony of their third-floor apartment. What will happen to the acceleration o

trasher [3.6K]

The trash bag will gain gain speed in till hitting the ground and passably exploding on impact of the ground depending on the strength of the trash bag it may rip during the fall.

If this was not what you were looking for please explain what you need in more detail.

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3 years ago

If a runner runs a race on a circular track that has a radius of 30 m and they complete the race in 125 seconds, but they end th

satela [25.4K]

To answer this question you must know that speed is only one magnitude, but velocity is a magnitude with an associated direction, that is, it is a vector.

For a circular movement like the one shown in the problem the velocity is defined as:

$V = wr[-sin(\theta) x + cos (\theta)y]$