3 years ago

A paratrooper jumping from the plane lands safely ,why?

1 answer:

3 0

A paratrooper opens parachute immediately after jumping to increase the air resistance and land safely on the ground. as the speed of the paratrooper increases, the air resistance also increases

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It takes 85N of force to accelerate a ball at a rate of 15 m/s². What is the mass of the ball?

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Explanation:

F = ma

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3 years ago

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The radius of the circle traced out by the second hand on a clock is 6.00 cm. In a time t the tip of the second hand moves throu

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Answer:

30.29 s

Explanation:

We are given that

Radius=r=6 cm

Length of an arc=l=19 cm

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$\theta=\frac{l}{r}$

Substitute the values then we get

$\theta=\frac{19}{6}=3.17 rad$

We know that

1 minute=60 seconds

In 60 seconds ,second hand makes an angle= $2\pi$ radian

$2\pi$ radian made by second had in 60 sec.

1 radian made by second hand in $\frac{60}{2\pi}$ sec

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4 years ago

Calculate the frequency of photon 434E-9 and speed of light 3E8m/s

svetoff [14.1K]

Answer:

f = 6.912 E14 Hz

Explanation:

The speed of the wave is defined as

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the frequency of the photon is defined as

f = speed / wavelength

f = 3 E8 m/s / 434 E-9 m

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3 years ago

A paratrooper jumping from the plane lands safely ,why?​

A paratrooper jumping from the plane lands safely ,why?