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zloy xaker [14]
3 years ago
5

When a 58g tennis ball is served, it accelerates from rest to a constant speed of 36 m/s. The impact with the racket gives the b

all a constant acceleration over a distance of 35 cm. What is the magnitude of the net force acting on the ball?
Physics
1 answer:
inysia [295]3 years ago
5 0
We first calculate the acceleration on the ball using:
2as = v² - u²; u = 0 because ball is initially at rest
a = (36)²/(2 x  0.35)
a = 1850 m/s²
F = ma
F = 0.058 x 1850
= 107.3 Newtons
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According to the <u>second principle of thermodynamics:</u>  

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In other words: <u>Entropy is the measure of the disorder of a system</u> and is a function of state.

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Answer:

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A car travels due east 14 miles in 18 minutes. Then, the car turns around and returns to its starting point, taking an additiona
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Answer:

(a) The average speed is 0.85 milles/minute

(b) The average velocity is zero

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In order to answer part (a) and (b) you have to apply the formulas for average speed and average velocity which are:

<em>-Average speed formula:</em>

v=\frac{d}{t}

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Replacing the given values:

v=\frac{14+14}{18+15}\\v=\frac{28}{33} \\v=0.85 milles/minute

Notice that you have to replace the total distance, which is 14 milles for the go plus 14 milles for the return. The same for the total time.

<em>-Average velocity formula:</em>

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Where X2 is the final position and X1 is the initial position

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4 0
3 years ago
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Answer:

La distancia por carretera de Chitré a Parita es de 12 km o 39370.08 pies.

Explanation:

La regla de tres es una forma de resolver problemas de proporcionalidad entre tres valores conocidos y un valor desconocido, estableciendo una relación de proporcionalidad entre todos ellos.

Si la relación entre las magnitudes es directa, es decir, cuando una magnitud aumenta, también lo hace la otra (o cuando una magnitud disminuye, también lo hace la otra), se debe aplicar la regla directa de tres. Para resolver una regla directa de tres, se debe seguir la siguiente fórmula, siendo a, b y c los valores conocidos y x el valor a determinar:

a ⇒ b

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7 0
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Vesnalui [34]

Answer:

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4 0
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