Answer:
Explanation:
We can use the following SUVAT equation to solve the problem:
where
v = 0 is the final velocity of the car
u = 24 m/s is the initial velocity
a is the acceleration
d = 196 m is the displacement of the car before coming to a stop
Solving the equation for a, we find the acceleration:
Answer:
The inducerd emf is 1.08 V
Solution:
As per the question:
Altitude of the satellite, H = 400 km
Length of the antenna, l = 1.76 m
Magnetic field, B =
Now,
When a conducting rod moves in a uniform magnetic field linearly with velocity, v, then the potential difference due to its motion is given by:
Here, velocity v is perpendicular to the rod
Thus
e = lvB (1)
For the orbital velocity of the satellite at an altitude, H:
where
G = Gravitational constant
= mass of earth
= radius of earth
Using this value value in eqn (1):
To solve this problem it is necessary to take into account the concepts related to Centripetal Force and Friction Force.
In the case of the centripetal force, we know that it is defined as
Where,
m=mass
v= velocity
r= Radius
In the case of the Force of Friction we have to,
Where,
Friction Constant
m= mass
g= gravity
According to the information given, the centripetal force must be less than or equal to the friction force to stay on the road, in this way
Re-arrange to find the velocity,
Therefore la velocidad del carro debe ser igual o menor a 42m/s para mantenerse en el camino