Physics, 06.09.2019 01:20 Kimberley5752

While the woods hole martha's vineyard ferry boat steamed along at 8 mph through calm seas, passenger casey exercised by walking the perimeter of the rectangular deck, at a steady 4 mph. discuss the variations in casey's speed relative to the water

Answers: 2

Show answers

Answers

Answer from: historygal

If Casey is going in the boat's direction, her speed relative to the water is 12 mph in the direction of the boat.

If she is going oposite the boat's direction, her speed relative to the water is 4 mph in the direction of the boat.

If she is going perpendicular to the boat, her speed relative to the water is 8.94 mph in a direction that forms an angle of about 26º with the direction the boat is moving.

Explanation:

The speed of Casey with respect with the water depends on the direction she's moving in the deck. The deck has four sides, so there's four possible directions for Casey to move.

Since the water is calm, it's velocity is 0 mph so it doesn't modify the speeds of either Casey or the boat.

Let's consider the boat is moving to the right. That means it's speed with respecto to the water is 8 mph. If we were floating on the water watching from the side the boat and Casey pass by, when she's moving from left to right she seems faster beacuse she's moving in the same direction as the boat and her speed is added to the boats, so it would seem she's walking at 8 mph + 4 mph = 12 mph.

When Casey is moving from riht to left on the deck, she would seem to be moving from left to right at a speed of 4 mph from the water, because the boats speed is higher than hers and is in the opposite direction.

Finally, when she is moving either upwards or downwards, her direction forms a 90º angle with the direction the boat is moving, so her total speed is a vector with horizontal component of 8 mph (going from left to right, the boats speed) and vertical component of 4 mph (with the direction she's moving, either upwards or downwards). By Pythagoras theorem, her velocity would be $\sqrt{(8 mph)^2+(4mph)^2}=8.94 mph$ and her direction would form an angle of $arccotangent(\frac{4}{8})=0.464 rads$ with the direction the boat is moving, which is about 26º.

Answer from: Quest

A.adasnsnsnnskakakakwks

Answer from: Quest

The answer is a.first and third quarters

Another question on Physics

Physics, 22.06.2019 10:00

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Answers: 1

Answer

Physics, 22.06.2019 19:10

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to

Answers: 3

Answer

Physics, 22.06.2019 21:00

The amount of work done is determined by 2 factors. describe an example of work (using the scientific definition) list the 2 factors that determine the amount of work done.

Answers: 2

Answer

Physics, 23.06.2019 01:40

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.

Answers: 3

Answer

You know the right answer?

While the woods hole martha's vineyard ferry boat steamed along at 8 mph through calm seas, passenge...

Questions