3 years ago

A(n) 2602 kg van runs into the back of a(n)

Physics

1 answer:

forsale [732]3 years ago

8 0

Answer:

8.5 m/s

Explanation:

please see paper for the work!

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You kick a soccer ball straight up into the air with a speed of 21.2 m/s. How long does it take the soccer ball to reachbits hig

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Gravity increased the downward speed (or decreases the upward speed) by 9.8 m/s every second.

21.2/9.8 = 2.2 seconds

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Answer:

$a=159.32\ m/s^2$

Explanation:

It is given that,

Angular speed of the football spiral, $\omega=6.9\ rev/s=43.35\ rad/s$

Radius of a pro football, r = 8.5 cm = 0.085 m

The velocity is given by :

$v=r\omega$

$v=0.085\times 43.35$

v = 3.68 m/s

The centripetal acceleration is given by :

$a=\dfrac{v^2}{r}$

$a=\dfrac{(3.68)^2}{0.085}$

$a=159.32\ m/s^2$

So, the centripetal acceleration of the laces on the football is $159.32\ m/s^2$ . Hence, this is the required solution.

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3 years ago

People with good hearing can perceive sounds as low in level as −7.53 dB at a frequency of 3000 Hz. What is the intensity of thi

lora16 [44]

Answer:

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3 years ago

4. The 50-kg crate shown in Fig. rests on a horizontal surface for which the coefficient of

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Answer:

5.057 m/s^2

Explanation:

Force of kinetic friction = .3 = F /normal force

.3 = F /(50* 9.81) F of friction = 147.15

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2 years ago

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3 years ago

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