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
GREYUIT [131]
3 years ago
5

A girl at an airport rolls a ball north on a moving walking that moves east. If the ball’s speed with respect to the walkway is

0.15m/s and the walkway moves at a speed of 1.50m/s, what is the velocity of the ball relative to the ground?
Physics
1 answer:
sweet-ann [11.9K]3 years ago
4 0

We have to add two vectors.

Vector #1: 0.15 m/s north

Vector #2: 1.50 m/s east

Their sum:

Magnitude: √(0.15² + 1.50²)

Magnitude = √(0.0225+2.25)

Magnitude = √2.2725

Magnitude = <em>1.5075 m/s</em>

Direction = arctan(0.15/1.50) north of east

Direction = <em>5.71° north of east</em>

You might be interested in
What increases when the frequency of a sound increases
andrew-mc [135]
The sound is basically just frequency. Because the sound becomes higher in pitch.

<span>
</span>
4 0
2 years ago
The earth has a net electric charge that causes a field at points near its surface equal to 150 N/C and directed in toward the c
maria [59]

To solve this problem we will start using the concepts related to the electric field, from there we will find the load exerted on the body. Through this load it will be possible to make a sum of forces in balance to find the load that a human supports. Finally with these values it will be possible to find the repulsive force. We will proceed as follows,

The electric field is

E= \frac{kQ}{R^2}

Here,

k = Coulomb's Constant

Q = Charge

R = Distance (At this case from the center of mass of the earth to the surface)

Rearranging to find the charge,

Q = \frac{ER^2}{k}

Replacing,

Q = frac{(150)(6.38*10^6)}{8.99*10^9}

Q = 6.79*10^5 C

Since the electric field is directed towards the center of earth, the charge is negative.

PART A) Once the load is found we can proceed to apply the balance of Forces, for which the electrostatic force must be equivalent to the weight, this in order to satisfy the balance, therefore

F_w = F_e

mg = \frac{kQq}{R^2}

Replacing,

(62)(9.8) = \frac{(8.99*10^9)(q)(-6.79*10^5)}{(6.38*10^6)^2}

Solving for q,

q = -4.056C

PART B) Finally using the given distance and the values of the found load we can find the repulsive Force, which is

F =\frac{kq^2}{d^2}

F = \frac{(8.99*10^9)(-4.056)^2}{110^2}

F = 1.22*10^7N

PART C) The answer is no. According to the information found, we can conclude that traveling through an electric field is not viable because there is a repulsive force of great magnitude acting on the body.

3 0
3 years ago
Find an expression for the acceleration a of the red block after it is released. use mr for the mass of the red block, mg for th
Drupady [299]

<span>Assuming pulley is frictionless. Let the tension be ‘T’. See equation below.</span>

<span> </span>

6 0
3 years ago
Read 2 more answers
Which type of current is produced by a wire breaking magnetic field lines and changing the polarity?
Hoochie [10]

Answer:

Alternating current will produced by a wire breaking magnetic field lines and changing the polarity.

Explanation:

8 0
3 years ago
Read 2 more answers
A 10 kg ball has a momentum of 40 kg.m/s.what is the ball's speed?
iren [92.7K]
M = 10kg
P = 40 kg.m/s
V= 4m/s

Formula v = p/m

V= p/m
=4okg.m/s / 10kg
=4m/s
7 0
3 years ago
Other questions:
  • georgia is jogging with a velocity of 4 m/s when she accelerates at 2 m/s squared for 3 seconds. How fast is Georgia running now
    6·1 answer
  • Haw does density of a liquid vary with the temperature
    15·2 answers
  • A direct result of european exploration of north america during the 1500s and early 1600s was the
    13·1 answer
  • What is its moment of inertia about an axis that passes through its center?
    14·1 answer
  • Explain including specific heat in your response, why the average Long Island ocean water temperature in May (52F) is cooler tha
    8·2 answers
  • in December which will have a longer day length a country im notheren hemisphere or southern hemisphere​
    12·1 answer
  • Jax fell while running and cut his knee. He noticed at the end of the day that his body had produced a hard film over his scrape
    7·1 answer
  • Physical science-current can be increased by...
    10·2 answers
  • What is the acceleration of a bike that starts from rest and after 10s is traveling 20m/s?
    15·1 answer
  • Gestalt Psychology emphasizes that humans perceive the world _________________.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!