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aleksandr82 [10.1K]
3 years ago
7

Two runners are competing in track meet. Samantha runs with a speed of 10 m/s and completes her race in 10 seconds. Jordin takes

15 seconds to finish her race, running with a speed of 8 m/s. Which statement best describes the difference in the distance each runner ran?
A. Jordin's distance was longer by 10 meters.
B. Jordin's distance was longer by 20 meters.
C. Samantha's distance was longer by 2 meters.
D. Samantha's distance was longer by 10 meters.
Physics
2 answers:
Mashutka [201]3 years ago
6 0
The answer for this question is B.
Nostrana [21]3 years ago
3 0

Answer:

B. Jordin's distance was longer by 20 meters.

Explanation:

The distance Samantha runs = Samantha's speed ×  Samantha's time = 10 m/s × 10 s = 100 m

The distance Jordin runs = Jordin's speed × Jordin's time = 8 m/s × 15 s = 120 m.

The difference in the distance run = (120 - 100) m = 20 m.

So, Jordin's distance is 20 m more than that of Samantha.

So, Jordin's distance was longer by 20 meters is the answer.

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Explanation:

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3 years ago
The magnet below is cut in half. what will be the result?
ozzi
<h2>Answer:</h2>

C.

<h2>Explanation:</h2>

This is what we call a permanent magnet. By the  way, the magnetic phenomena were first observed about 2500 years ago near the ancient city of Magnesia, what is today Manisa, located in western Turkey, when people saw fragments of magnetized iron. So <em>what happens if you cut a magnet in half? </em>Well, a magnet has two ends, the first one is called a north pole or N pole while the  other end is a south pole or S pole, so if you break a bar magnet, each piece  has a north and south pole, no matter the size of each new bar although the smaller the  piece, the weaker its magnetism. This is true because unlike electric charges, you always find magnetic poles  in pairs, that is, ¡they can't be isolated! The option is C. because in the great bar the north pole is to the left while the south pole is to right.

3 0
3 years ago
Read 2 more answers
A skateboarder, with an initial speed of 2.0 m/s, rolls virtually friction free down a straight incline of length 18 m in 3.3 s.
lesya692 [45]

Initial speed of the skateboarder (u) = 2 m/s

Distance covered (s) = 18 m

Time taken = 3.3 seconds

Let the acceleration be a.

Using seconds equation of motion:

s = ut + \frac{1}{2} a t^2

18 = 2 \times 3.3 + \frac{1}{2}a \times 3.3^2

a = \frac{11.4 \times 2}{10.89}

a = 2.09 m/s^2

Now, Acceleration down the incline = g Sin Θ

g Sin Θ = a

9.8 × Sin Θ = 2.09

Sin Θ = \frac{2.09}{9.8}

Θ = 12.31°

Hence, the angle of the inclined plane is: Θ = 12.31°

4 0
4 years ago
A 70.0 kg person jumping down from a 3.00 meter wall hits the ground at 7.70 m/s. He hits the ground with stiff legs and stops i
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Answer:

F_{net} = 24434.783\,N

Explanation:

Let consider that the person hit the ground in the negative direction. The physical model for the impact is modelled after the Impact Theorem:

m_{person}\cdot v + Imp = 0

The impact is:

Imp = - m_{person}\cdot v

Imp = - (70\,kg)\cdot (-7.70\,\frac{m}{s} )

Imp = 539\,N\cdot s

The force of impact is derived as follows:

F_{net} = \frac{Imp}{\Delta t}

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3 years ago
Which of the following is not a step toward planning your goals?
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C. Disregard a goal if you don’t achieve it

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