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
denis-greek [22]
3 years ago
10

A vector is parallel to the y axis, what is it x component?​

Physics
1 answer:
slavikrds [6]3 years ago
4 0

Answer:

Explanation:

A vector is parallel to the y axis .

Let its magnitude be A . So the vector can be represented as A j .

where i and j are unit vectors in x and y axis direction .

The x component of A j will be dot product of A j with i

The x component of A j = A j . i

= A x 0      [  Since j . i = 0 ]

= 0

You might be interested in
Arigid body must rotate about an axis in order for it to have angular momentum about that axis. True False
kompoz [17]

Answer:

False

Explanation:

Let's consider the definition of the angular momentum,

\vec{L} = I \vec{\omega}

where I = \int\limits_m r^2 dm = \lim_{n \to \infty} \sum\limits_{i=1}^n m_i r_i^2 is the moment of inertia for a rigid body. Now, this moment of inertia could change if we change the axis of rotation, because "r" is defined as the distance between the puntual mass and the nearest point on the axis of rotation, but still it's going to have some value. On the other hand,

\vec{\omega} = \frac{\vec{r} \times \vec{v}}{r^2} so \vec{\omega} \neq 0 unless \vec{r} ║  \vec{v}.

In conclusion, a rigid body could rotate about certain axis, generating an angular momentum, but if you choose another axis, there could be some parts of the rigid body rotating around the new axis, especially if there is a projection of the old axis in the new one.

7 0
3 years ago
A metal container with the oil weigh
MA_775_DIABLO [31]

Answer:

16 kg

Explanation:

M - container

m - oil mass

by definition of density ,

relative density is the ratio of the density of a substance to the density of water.

relative density = density/ density of water

density of oil = 1.2*1000 kgm⁻³  = 1200 kgm⁻³

1 Litre =10⁻³ m³

oil volume = 80 *10⁻³ m³

mass of oil = density * volume

                   = 1200*80*10⁻³

                   = 96 kg

Mass of container + mass of  oil =112

mass of container = 112 - 96

                              = 16 kg

7 0
3 years ago
Study the image of the moving car.
gayaneshka [121]

Answer:

While traveling downhill, the car’s potential is <u>increasing</u> and kinetic energy is <u>decreasing</u>

Explanation:

hope this helps!

6 0
2 years ago
Read 2 more answers
A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s, how high is the cliff, if it took 12 s for the
Vesna [10]

Answer:

The height of the cliff from which the ball was dropped from is 224.4m.

\overline{v}={\frac{\Delta x}{\Delta t}}

Given the data in the question;

Initial velocity of the ball;

Time taken by the ball to reach the ground;

Distance or Height of the cliff from which the ball was thrown from;

To get the height of the Cliff, we use the Second Equation of Motion:

Where s is the distance or height,  is the initial velocity, t is the time and a is the acceleration. Since the ball was thrown down from a certain height (cliff), its is now under the influence of gravity. acceleration due to gravity;

Hence, the equation becomes

We substitute the given values into the equation

Therefore, the height of the cliff from which the ball was dropped from is 224.4m

Explanation:

3 0
2 years ago
Read 2 more answers
A plane traveling 40 m/s drops a box from a height of 186 m. Where does the box strike the ground relative to the point directly
Arte-miy333 [17]

Answer:the horizontal velocity is 40

Explanation:

8 0
3 years ago
Other questions:
  • Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction
    15·2 answers
  • AN airplane travels 4000 m in 20s on a heading 0f 35 degrees north west. Calculate average velocity .
    15·1 answer
  • What is polarization?
    8·1 answer
  • The current world-record motorcycle jump is 77.0 m, set by Jason Renie. Assume that he left the take-off ramp at 11.0° to the ho
    15·1 answer
  • A parent swings a 13.5 kg child
    13·1 answer
  • Which government agency is responsible for protecting the nation’s transportation systems to ensure freedom of movement for pass
    10·2 answers
  • The insulating solid sphere in the previous Example 24.5 has the same total charge Q and radius a as the thin shell in the examp
    9·1 answer
  • An astronaut floating in space throws a wrench forward with the force of 10 N.
    11·2 answers
  • What happens to the orbit time as the distance increases.
    12·1 answer
  • Am object of mass in a circular path of radius 100metres with the speed of 10metres/second.calculate the acceleration towards th
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!