Ask question

Ask question

All categories

katrin2010 [14]

3 years ago

7

A 2300 kg sailboat is moving west at 5.5 m/s when an eastward wind

1 answer:

pogonyaev3 years ago

5 0

The boat is initially at equilibrium since it seems to start off at a constant speed of 5.5 m/s. If the wind applies a force of 950 N, then it is applying an acceleration <em>a</em> of

950 N = (2300 kg) <em>a</em>

<em>a</em> = (950 N) / (2300 kg)

<em>a</em> ≈ 0.413 m/s²

Take east to be positive and west to be negative, so that the boat has an initial velocity of -5.5 m/s. Then after 11.5 s, the boat will attain a velocity of

<em>v</em> = -5.5 m/s + <em>a</em> (11.5 s)

<em>v</em> = -0.75 m/s

which means the wind slows the boat down to a velocity of 0.75 m/s westward.

You might be interested in

If A vector = i^-j^+k^ then unit vector in the direction of A vector

Novosadov [1.4K]

If <em>A</em> = <em>i</em> - <em>j</em> + <em>k</em>, then the magnitude of <em>A</em> is

||<em>A</em>|| = √(1² + (-1)² + 1²) = √3

Then the unit vector in the direction of <em>A</em> is 1/||A|| multiplied by <em>A</em> :

<em>u</em> = <em>A</em>/||<em>A</em>|| = (<em>i</em> - <em>j</em> + <em>k</em>)/√3

(choice D)

6 0

3 years ago

Select the correct answer. A car is moving at a constant speed along a straight line. Which statement is true about the forces a

agasfer [191]

Answer:

i think try theanswer

Explanation:

proper

7 0

3 years ago

Read 2 more answers

Why are concussions a major concern? CER <br> Claim<br> Evidence<br> Reasoning

madreJ [45]

Answer:

Because they can damage and severely alter the brain

Explanation:

Public health service website

3 0

3 years ago

Light of wavelength 645 nm is incident on a double slit. The angle between the central bright fringe and the second dark fringe

kumpel [21]

Answer:

Slit separation, $d=1.13\times 10^{-5}\ m$

Explanation:

It is given that,

Wavelength of light, $\lambda=645\ nm=645\times 10^{-9}\ m$

The angle between the central bright fringe and the second dark fringe, $\theta=4.9^{\circ}$

In case of double slits, the condition for dark fringe is given by :

$d\ sin\theta=(n-\dfrac{1}{2})\lambda$

n = 2

$d\ sin\theta=\dfrac{3}{2}\lambda$

$d=\dfrac{3\lambda}{2\ sin\theta}$

$d=\dfrac{3\times 645\times 10^{-9}}{2\ sin(4.9)}$

$d=1.13\times 10^{-5}\ m$

So, the slit separation is $1.13\times 10^{-5}\ m$ . Hence, this is the required solution.

8 0

3 years ago

A 15 000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m. If a connecting cylinder with a piston of

victus00 [196]

Answer:

the force applied to the smaller piston is 600 N

Explanation:

Given;

weight of the car, F = 15,000 N

radius of the lager piston, R = 0.2 m

radius of the smaller piston, r = 0.04 m

let the force applied to the smaller piston = f

The pressure applied on both piston is constant;

$P = \frac{F}{A} = \frac{f}{a} \\\\\frac{F}{R^2} = \frac{f}{r^2} \\\\f = \frac{F\times r^2}{R^2} = \frac{15,000 \times (0.04)^2}{(0.2)^2} = 600 \ N$

Therefore, the force applied to the smaller piston is 600 N

5 0

3 years ago