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Sunny_sXe [5.5K]
3 years ago
6

The plot of velocity versus time is a horizantal line between,(0, 4), and (5, 4). Time is measures in seconds and velocity in me

ters per second. What is the position at t=5 s if the position at t=0 was 6 m?
Physics
2 answers:
defon3 years ago
3 0

Well, first of all, let's not make something complicated ... for which we're missing an important component anyway ... out of something simple.  There's more to "velocity" than 'meters per second'.  So let's just call that what it is: " Speed ".

Here's what you've told us:

-- Something is moving along a ruler or meter stick.

-- At every instant from time=0 to time=5, its speed was constant at 4 m/s.

-- At time=0, it was located at  6m .

We can calculate:

-- Moving steadily at 4 m/s for 5 seconds, it moved (4 x 5) = 20 meters.

-- If it was located at  6m  when time=0, then at time=6, it had advanced
to (6 + 20) = 26 meters.

valkas [14]3 years ago
3 0

Answer:

26 meters.

Explanation:

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Suppose the original segment of wire is stretched to 10 times its original length. How much charge must be added to the wire to
Debora [2.8K]

Here we want to study how the linear charge density changes as we change the measures of our body.

We will find that we need to add 9*Q of charge to keep the linear charge density unchanged.

<em>I will take two assumptions:</em>

The charge is homogeneous, so the density is constant all along the wire.

As we work with a linear charge density we work in one dimension, so the wire "has no radius"

Originally, the wire has a charge Q and a length L.

The linear charge density will be given by:

λ = Q/L

Now the length of the wire is stretched to 10 times the original length, so we have:

L' = 10*L

We want to find the value of Q' such that λ' (the <u>linear density of the stretched wire</u>) is still equal to λ.

Then we will have:

λ' = Q'/L' = Q'/(10*L) = λ = Q/L

Q'/(10*L) = Q/L

Q'/10 = Q

Q' = 10*Q

So the new <u>charge must be 10 times the original charge</u>, this means that we need to add 9*Q of charge to keep the linear charge density unchanged.

If you want to learn more, you can read:

brainly.com/question/14514975

6 0
3 years ago
A 15-lb block B starts from rest and slides on the 25-lb wedge A, which is supported by a horizontal surface. Neglecting frictio
xxTIMURxx [149]

The angle of the wedge is 30°.

Answer:

5.88 ft/s

Explanation:

a) The block will slide down due to it's weight.

initial velocity u= 0

final velocity, v

acceleration, a = g sin 30° = 32 ft/s²× sin 30° = 16 ft/s²

Sliding displacement, s = 3ft

Use third equation of motion:

v^2-u^2 = 2as

substitute the values and solve for v

v^2-0 = 2\times 16 \times 3 =96 ft^2/s^2\\v = 9.8 ft/s

b) Use conservation of momentum:

Initial momentum of the system  = 0

final momentum = (15) ( 9.8)+ (25)(v')

v' = 5.88 ft/s

3 0
3 years ago
Write down the (real) electric and magnetic fields for a monochromatic plane wave of amplitude E0 , frequency w, and phase angle
jeka57 [31]

Answer:

a) the oscillation of this field is in phase, when the magnetic field goes in the negative direction of y, the elective field goes in the positive direction of the z axis

b) the direction of the magnetic field perpendicular to this electric field and the speed in the negative x the magnetic field goes in the x direction and in the direction (1, - 1.1)

Explanation:

a) the polarization the determined wave oscillates the electric field, which is the z axis

 As the wave travels on the negative x-axis and the magnetic field is perpendicular, this field goes on the positive y-axis

the oscillation of this field is in phase, when the magnetic field goes in the negative direction of y, the elective field goes in the positive direction of the z axis

be) in the case of a polarization in the xi plane the magnetic field must go in the direction of the magnetic field perpendicular to this electric field and the speed in the negative x the magnetic field goes in the x direction and in the direction (1, - 1.1)

3 0
3 years ago
For these pictures is more or less friction needed?
antiseptic1488 [7]

Answer:

8: More

9: More

10: More

11: Less

12: Less

12: More

4 0
3 years ago
When the temperature of air rises, the amount of water needed for saturation
Oliga [24]
It Increases. I just took a quiz with the same question.
7 0
4 years ago
Read 2 more answers
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