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Aleksandr-060686 [28]
3 years ago
6

A 430 g soccer ball lying on the ground is kicked and flies off at 25 m/s. If the duration of the impact was .01 s, what was the

average force acting on the ball?
Physics
1 answer:
maw [93]3 years ago
4 0
<h2>The average force acting on the ball is 1075 N in the direction of travel of ball.</h2>

Explanation:

Force is given by rate of change of momentum.

Mass of soccer ball = 430 g = 0.43 kg

Initial velocity = 0 m/s

Final velocity = 25 m/s

Change in momentum = 0.43 x 25 - 0.43 x 0

Change in momentum = 10.75 kg m/s

Time taken = 0.01 s

Rate of change of momentum = Change in momentum ÷ Time

Rate of change of momentum = 10.75 ÷ 0.01

Rate of change of momentum = 1075 N

Force = 1075 N

The average force acting on the ball is 1075 N in the direction of travel of ball.

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An earthquake releases two types of traveling seismic waves, called transverse and longitudinal waves. The average speed of the
Norma-Jean [14]

Answer:

1083.173 km

Explanation:

Speed of longitudinal waves = 9.1 km/s

Speed of transverse waves = 5.7 km/s

Time taken by the longitudinal wave is t

Time taken by the transverse wave is t+71

Distance = Speed × Time

Distance traveled by the longitudinal wave

\text{Distance}=9.1t

Distance traveled by the transverse wave

\text{Distance}=5.7(t+71)

Since both distances are equal

9.1t=5.7(t+71)\\\Rightarrow 9.1t-5.7t=404.7\\\Rightarrow 3.4t=404.7\\\Rightarrow t=\frac{404.7}{3.4}=119.03\ s

The time taken by the longitudinal wave is 119.03 seconds

Distance traveled by the longitudinal wave

9.1t=9.1\times 119.03=1083.173\ km

The earthquake is 1083.173 km away

7 0
4 years ago
Which nucleus completes the following equation?<br> Se+?<br> O A. Ga<br> B. P<br> C. 31P<br> D. CI
Finger [1]

Answer:First option

Explanation:

hope it helped

7 0
3 years ago
A spinning disc rotating at 130 rev/min slows and stops 31 s later. how many revolutions did the disc make during this time?
gayaneshka [121]
F = 130 revs/min = 130/60 revs/s = 13/6 revs/s
t = 31s
wi = 2πf = 2π × 13/6 = 13π/3 rads/s
wf = 0 rads/s = wi + at
a = -wi/t = -13π/3 × 1/31 = -13π/93 rads/s²
wf² - wi² = 2a∅
-169π²/9 rads²/s² = 2 × -13π/93 rads/s² × ∅
∅ = 1209π/18 rads
n = ∅/2π = (1209π/18)/(2π) = 1209/36 ≈ 33.5833 revolutions.
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3 years ago
PLEASE ANSWER! WILL MARK BRAINLIEST!
KatRina [158]
The answer is a Mid-Ocean ridge.
5 0
4 years ago
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Why do you think scientists put their results in data tables and graphs?
Nikolay [14]

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Have a nice day (^-^) ;)

8 0
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