An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s2
1 answer:
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Answer:
Explanation:
One of the first propulsion characteristics given in the example is that all engines are equal.
In this way if we have 4 engines running at the same time, it means that its capacity is 100%.
Under this premise, if 100% is found, the Jet is capable of reaching a speed of 8.7m / s ^ 2.
However, the question is, what would happen if 2.4 "Engines" now work.
To do this then we make a simple equivalence,
If 4 engines is the equivalent of 100%, when would it be 2.4 engines?
In this way it would mean that the body could be driven to 60% of its total.
So
Answer:
<u>For proton:</u>
A. The proton is released from Vb (highest potential)
B. v = 2.9x10⁴ m/s
<u>For electron:</u>
A. The electron is released from Va (lowest potential)
B. v = 1.2x10⁶ m/s
Explanation:
<u>For a proton we have</u>:
A. To find the origin from which the proton was released we need to remember that in a potential difference, a proton moves from the highest potential to the lowest potential.
Having that:
Va = 1.51 V and Vb = 5.81 V
We can see that the proton moves from Vb to Va, hence the proton was released from Vb.
B. We now that the work done by an electric field is given by:
(1)
Where:
q: is the proton's charge = 1.6x10⁻¹⁹ C
V: is the potential
Also, the work is equal to:
(2)
Where:
K: is the kinetic energy
m: is the proton's mass = 1.67x10⁻²⁷ kg
: is the velocity in the point a
: is the velocity in the point b = 0 (starts from rest)
Matching equation (1) with (2) we have:
<u>For an electron we have</u>:
A. For an electron we know that it moves from the lowest potential (Va) to the highest potential (Vb), so it is released from Va.
B. The speed is:
Since = 0 (starts from rest) and
= 9.1x10⁻³¹ kg (electron's mass), we have:
I hope it helps you!