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2 years ago

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds.

2 answers:

6 0

So, acceleration is the change of velocity in time. If no vectors are used, one can use speed:

a = (final speed - start peed)/ time = 10/5= 1 m/s^2,

Notice that the units are m/s^2, or (m/s)/s. That is speed (m/s) per unit time (s)

MariettaO [177]2 years ago

4 0

its 2 meters per sec

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10 N 30 N 4kg net force = a=f/m=

ICE Princess25 [194]

Answer:

$a=5\ m/s^2$

Explanation:

Two forces are 10 N and 30 N. Let us assume that two forces are acting in opposite directions. Net force will be :

F = 30 N - 10 N = 20 N

Now,

F = ma

⇒ a = F/m

So,

$a=\dfrac{20}{4}\\\\a=5\ m/s^2$

So, the acceleration of the object is $5\ m/s^2$ .

6 0

2 years ago

If the wind velocity is 43 km/h due south, in what direction should the pilot set her course to travel due west? Use the same ai

Amiraneli [1.4K]

Answer:

11.48 degree N of W

Explanation:

We are given that

Wind velocity= $v_w=-43$ km/h

Because wind is blowing towards south

Air speed= $v_a=-212km/h$

Because the captain want to move with air speed in west direction.

x component of relative velocity=-212 km/h

y-Component of relative velocity=-43km/h

Direction= $\theta=tan^{-1}(\frac{y}{x})$

$\theta=tan^{-1}(\frac{-43}{-212}=11.48^{\circ}$ N of W

Hence, the direction in which the pilot should set her course to travel due west=11.48 degree N of W

4 0

2 years ago

Describe three events about matter and energy that cannot be explained

nekit [7.7K]

Answer:

As anything that has mass and takes up space. Matter is found in 3 major states; solid, liquid and gas. Atoms are the smallest particle of matter. They are so small that you cannot see them with your eyes or even with a standard microscope.

Have a good day! :D

Explanation:

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2 years ago

A satellite that is in a circular orbit 230 km above the surface of the planet Zeeman-474 has an orbital period of 89 min. The r

ehidna [41]

Answer:

Mass of the planet = 6.0 × $10^{24}$