A material used for electrical wiring must have ?
1 answer:
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The distance of the track is 600 m
Explanation:
The two cars move by uniformly accelerated motion, so we the distance they cover after a time t is described by the following suvat equation
where
u is the initial velocity
a is the acceleration
For car 1, we have
where
is the initial velocity of car 1
is the acceleration of car 1
So the equation can be rewritten as
For car 2, we have
where
is the initial velocity of car 2
is the acceleration of car 2
So the equation can be rewritten as
The two cars finish the race at the same time: this means that they cover the same distance in the same time t, so we can write
And solving for t, we find
Which gives two solutions:
t = 0 (initial instant)
t = 40 s
Therefore, the distance of the track is
Learn more about accelerated motion:
#LearnwithBrainly
Answer:
C. A quantity with magnitude and a direction.
Explanation:
A vector can be defined as a quantity with magnitude and direction. Some examples of vector quantities are velocity, position, displacement, force, torque, acceleration.
For example, given the following data;
Time, t = 18.5secs
Final velocity = 78m/s
Initial velocity = 0
Substituting into the equation;
Acceleration, a = 4.22m/s²
Therefore, the acceleration of the object is 4.22m/s² due North.
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
Where,
a is acceleration measured in
v and u is final and initial velocity respectively, measured in
t is time measured in seconds.
Answer:
Therefore the amplitude of the resultant wave is
Explanation:
The equation of wave:
y=A sin (kx-ωt)
For wave 1:
y₁=A sin (kx-ωt) = sin (kx-ωt)
For wave 2:
y₂=A sin (kx-ωt+Φ) = sin (kx-ωt+Φ)
Where A= amplitude=
The angular frequency
,
= wave length.
t= time
T= Time period
= phase difference =
The resultant wave will be
y = y₁ + y₂
= sin (kx-ωt) +
sin (kx-ωt+Φ)
{sin (kx-ωt) + sin (kx-ωt+Φ)}
Therefore the amplitude of the resultant wave is