1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PtichkaEL [24]
3 years ago
7

You are hungry and decide to go to your favorite neighborhood fast-food restaurant. You leave your apartment and take the elevat

or 10 flights down (each flight is 3.0 m) and then go 15 m south to the apartment exit. You then proceed 0.2 km east, turn north, and go 0.1 km to the entrance of the restaurant.
Part A

Determine the displacement from your apartment to the restaurant. Use unit vector notation for your answer, being sure to make clear your choice of coordinates.

Take the beginning of the journey as the origin, with north being the y-direction, east the x-direction, and the z-axis vertical.

Part B

How far did you travel along the path you took from your apartment to the restaurant?

Part C

What is the magnitude of the displacement you calculated in part
Physics
1 answer:
Viktor [21]3 years ago
7 0

Answer:

A)  R = (200 i ^ + 100 j ^ + 30k ^) m , B)    L = 223.61 m , C)   R = 225.61 m

Explanation:

Part A

This is a vector summing exercise, let's take a Reference System where the z axis corresponds to the height (flights), the x axis is the East - West and the y axis corresponds to the North - South.

Let's write the displacements

Descending from the apartment

10 flights of 3 m each, the total descent is 30 m

                Z = 30 k ^ m

Offset at street level

            L1 = 0.2 i ^ km

            L2 = 0.1 j ^ km

Let's reduce everything to the SI system

          L1 = 0.2 * 1000 = 200 i ^ m

          L2 = 100 j ^ m

The distance traveled is

          R = (200 i ^ + 100 j ^ + 30k ^) m

Part B

The horizontal distance traveled can be found with the Pythagorean theorem for the coordinates in the plane

                L² = x² + y²

                L = √ (200² + 100²)

                L = 223.61 m

Part C

The magnitude of travel, let's use the Pythagorean theorem for the sum

             R² = x² + y² + z²

              R = √ (30² + 200² + 100²)

             R = 225.61 m

You might be interested in
An astronaut with a mass of 91 kg is 0.30 m above the moons surface. The astronauts potential energy is 46 J. Calculate the free
Blababa [14]

Answer:

the free-fall acceleration on the moon is 1.68 m/s^2

Explanation:

recall the formula for the gravitational potential energy (under acceleration of gravity "g"):

PE = m * g * h

replacing with our values for the problem:

46 J = 91 * g * 0.3

solve for the "g" on the Moon:

g = 46 / (91 * 0.3)

g = 1.68  m/s^2

3 0
2 years ago
What can parents do if they find a mistake in the student records?      A. They can’t do anything B. Make a correction themselve
Lelechka [254]
D. Ask the school to make the correction
5 0
3 years ago
Read 2 more answers
The amount of steering wheel movement needed to turn will ____________ the faster you go.
Naddika [18.5K]

Answer:

The answer to your question is Decrease

4 0
2 years ago
Read 2 more answers
3. Write any two types of force.​
Lerok [7]

Answer:

An <u>applied force</u> is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person.

A <u>friction force</u> is the force exerted by a surface as an object moves across it or makes an effort to move across it. There are at least two types of friction force - sliding and static friction. Though it is not always the case, the friction force often opposes the motion of an object. For example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion. Friction results from the two surfaces being pressed together closely, causing intermolecular attractive forces between molecules of different surfaces. As such, friction depends upon the nature of the two surfaces and upon the degree to which they are pressed together. The maximum amount of friction force that a surface can exert upon an object can be calculated using the formula below:

F_{frict} = µ • F_{norm}

8 0
2 years ago
1. The thin top layer of the crust is called the Crust. What are the two types of
kolbaska11 [484]
Oceanic and continental
8 0
3 years ago
Read 2 more answers
Other questions:
  • 3. How many valence electrons are in the outermost energy level of each of the following elements?
    10·1 answer
  • What are the units of the following properties? Enter your answer as a sequence of five letters separated by commas, e.g., A,F,G
    7·1 answer
  • In what direction must a force be applied so that the forces on the 1 kg object are balanced
    9·1 answer
  • Number of electrons in Na
    14·2 answers
  • A spring is hanging from the ceiling. Attaching a 500 g physics book to the spring causes it to stretch 20 cm in order to come t
    10·1 answer
  • Three identical point charges of 2.0 μC are placed on the x-axis. The first charge is at the origin, the second to the right at
    5·1 answer
  • One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a s
    7·1 answer
  • Plz help... asap I need it
    10·2 answers
  • Ifa truck starts from rest and it has acceleration of 4 m/s for 5 second
    8·1 answer
  • Which of the following surface will absorb radiant heat energy best
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!