Here average speed for given motion is defined as ratio of total distance covered by total time
so here we can say
here total distance can be calculated by formula
distance = speed * time
here given that its average speed is v = 2.05 m/s
for first half let the time is "t " seconds and the speed for that is 2.01 m/s
and for next half time will be same and it is "t " seconds again
so by plug in all data in above equation we have
so its speed for next half must be 2.09 m/s
Answer:
the magnitude of the electron's acceleration a at that moment =
Explanation:
The expression for the magnetic field is :
where:
= permeability of free space =
I = current in the wire = 12.7 A
r = distance from the wire to the field point = 3.47 cm =
The magnetic force exerted in the electrond passing through the straight conducting wire is:
F = Bvgsinθ
where :
B = magnetic field =
v = speed of light = (30.5 % )
q = charge of electrons =
θ = angle between speed of electron & field = 90°
F = () × (30.5 % ) × () × ( sin 90°)
F =
From Newtons second Law ;
F = ma
where m = mass =
Thus, the magnitude of the electron's acceleration a at that moment =
Answer:
resultant force
the vector aim is the resultant force
You need to find the acceleration . a=v-vo/t
a=6-10/4
a=-4/4
a=-1m/s/s or -1m/s^2
You’re welcome :)
Answer:
Explanation:
Frictional force = 7000 N
mass of car = 1300 kg . Initially car was moving uniformly so no force acting on car at that time . After frictional force acts , it creates deceleration or negative acceleration .
acceleration = force / mass
= - 7000 / 1300
= - 5.38 m / s²