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3 years ago

Select the correct answer.

Physics

1 answer:

natulia [17]3 years ago

7 0

Answer:

the power of pardon

Explanation:

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The pilot of an airplane traveling 45 m/s wants to drop supplies to flood victims isolated on a patch of land 160 m below. The s

Sidana [21]

Answer:

Explanation:

A object dropped from a plane from a certain height will follow a parabolic trajectory because it has a horizontal velocity equal to plane's velocity.

So, if supplies are to be dropped from a plane from a height of 160 m, let us calculate the time it takes to reach the ground.

$H=\frac{1}{2}gt^{2}\\160=\frac{1}{2}\times10\times t^{2}\\t=\sqrt{32}=4\sqrt{2}\text{ }sec$

So, in this time, the supply moves a horizontal distance of $(4\sqrt{2}\text{ }sec)\times(45\text{ }\frac{m}{sec})=180\sqrt{2}\text{ }m=254.56\text{ }m$ .

∴ The supply must be dropped when the plane is 255 m away.

5 0

3 years ago

A 1280 kg car is moving 4.92 m/s. a 509 N force then pushes it forward for 28.7 m. what is its final KE?(unit=J)PLEASE HELP

laila [671]

Answer:

The answer to your question is: total energy = 30100.4 J

Explanation:

Kinetic energy (KE) is the energy due to the movement of and object, its units are joules (J)

Data

mass = 1280 kg

speed = 4.92 m/s

Force = 509 N

distance = 28.7 m

Formula

$KE = \frac{1}{2} mv^{2}$

Work = Fd

Process

- Calculate Kinetic energy

- Calculate work

- Add both results

KE = $\frac{1}{2} (1280)(4.92)^{2}$

KE = 15492.1 J

Work = (509)(28.7)

Work = 14608.3 J

Total = 15492.1 + 14608.3

Total energy = 30100.4 J

8 0

3 years ago

Read 2 more answers

Two sets of staircases connect the floors of a tall building from ground level to rooftop. Staircase A is inclined at 30°. Stair

Andrew [12]

<span>At first glance, it seems that it would be more work to climb the staircase with the greater incline. But on further reflection, it is obvious that climbing the complete length of each staircase involves doing the same amount of work against gravity, because the vertical distance is the same. The answer is that each involves doing the same amount of work against gravity.</span>

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4 years ago

Submit a hand-drawn picture by you of the following.

Alexeev081 [22]

Try to draw Humpty Dumty cracked on the floor with men all around him

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3 years ago

If an oxygen molecule traveling at the rms speed bounces back and forth between opposite sides of a cubical vessel of 0.10 m on

Alisiya [41]

Answer:

1.25x10^-19N

Explanation:see attached file pls