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Anton [14]
3 years ago
5

A race car travels 765 km around a circular sprint track of radius 1.263 km. How many times did it go around the track?

Physics
1 answer:
sladkih [1.3K]3 years ago
4 0

Answer:

It will go 96 times around the track.

Explanation:

Given that,

Distance covered by the race car, d = 765 km

Radius of the circular sprint track, r = 1.263 km

Let n times did it go around the track. It is given by :

n=\dfrac{d}{C}

C is the circumference of the circular path, C=2\pi r

n=\dfrac{d}{2\pi r}

n=\dfrac{765}{2\pi \times 1.263}

n=96.4

Approximately, n = 96

So, it will go 96 times around the track. Hence, this is the required solution.

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Two blocks connected by a rope of negligible mass are being dragged by a horizontal force (see figure below). Suppose F = 65.0 N
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Refer to the diagram shown below.

g = 9.8 m/s², and air resistance is ignored.

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Then
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The density of sodium is 968 g/cm3. Suppose you need 250 gm of sodium for an experiment. Which volume of sodium do you need?
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A batter hits a baseball m = 0.41 kg from rest with a force of F = 81
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Answer:

7.0s

Explanation:

Mass = 0.41kg

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t = 0.22s

¤ = 29°

Lo = 86m

From impulse equation,

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Vx = Vo * cos ¤

Vy = Vo * sin ¤

Vx = 43.46 * cos 30° = 37.64 m/s

Vy = 43.46 sin 30° = 21.73 m/s

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L = Lo + Vy *t + ½gt²

0 = 86 + 21.73t - 4.9t²

4.9t² - 21.73t - 86 = 0

Solving for t in the quadratic equation,

t = 6.96 or -10.04

Using the positive root since time can't be negative, t = 6.96 approximately 7.0s

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