Answer:
Explanation:
= Permittivity of free space =
= Distance charge traveled = 2 m
v = Velocity of electron = 420 m/s
E = Electric field
= Mass of electron =
= Charge of electron =
As the energy of the system is conserved we have
For an infinite non conducting sheet electric field is given by
The surface charge density is
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