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Masteriza [31]
3 years ago
14

A girl dribbling a basketball is running a court that is 100 m in length. It takes her 4.2 seconds to reach the end of the court

. Calculate the girl's average speed during this trip.​
Physics
1 answer:
Travka [436]3 years ago
6 0

Divide the distance traveled by the time it took:

(100 m) / (4.2 s) ≈ 23.8 m/s

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Answer:

3

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Which of the following statements describes the trend in the data?
AURORKA [14]

Answer:

Explanation:

The answer is D- The number of flies decreased, then leveled off.

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Consider a steel guitar string of initial length L=1.00 meter and cross-sectional area A=0.500 square millimeters. The Young's m
Reil [10]

Answer:

\Delta l=0.015m

Explanation:

We have given initial length of the steel guitar l = 1 m

Cross sectional area A=0.5mm^2=0.5\times 10^{-6}m^2

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Force F = 1500 N

So stress =\frac{force}{area}=\frac{1500}{0.5\times 10^{-6}}=3000\times 10^{-6}=3\times 10^{9}Pa

We know that young's modulus =\frac{stress}{strain}

So 2\times 10^{11}=\frac{3\times 10^{9}}{strain}

strain=1.5\times 10^{-2}=0.015m

Now strain =\frac{\Delta l}{l}

0.015=\frac{\Delta l}{1}

\Delta l=0.015m

6 0
3 years ago
Read 2 more answers
As a laudably skeptical physics student, you want to test Coulomb's law. For this purpose, you set up a measurement in which a p
kherson [118]

Explanation:

The Coulomb's law states that the magnitude of each of the electric forces between two point-at-rest charges is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them:

F=\frac{kq_1q_2}{d^2}

In this case we have an electron (-e) and a proton (e), so:

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jarptica [38.1K]

-- The acceleration of gravity is 9.8 m/s².
So if there's no air resistance, the speed of a falling object
always increases by 9.8 m/s for every second it falls.

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-- If it has no vertical speed when it started, then at the end
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                         =       (0)            + (9.8 m/s²  x  3 sec)

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