The frictional force required is 9000 N
Explanation:
In order to keep the car in the turn in circular motion without sliding, the frictional force must provide the centripetal force necessary for the circular motion.
Therefore, we can write:
where the term on the left is the frictional force while the term on the right is the centripetal force, and where:
m is the mass of the car
v is its speed
r is the radius of the curve
For the car in this turn, we have
m = 1000 kg
v = 30 m/s
(since the diameter is 0.20 km, the radius is half that value)
And substituting, we find
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Answer:
The charge on each plate of the capacitor is
with one plate positive and one negative, i.e.,
Solution:
According to the question:
Critical value of Electric field,
Area of each plate of capacitor,
Now, the amount of charge on the capacitor's plates can be calculated as:
Capacitance, C = (1)
Also, Capacitance, C =
And
Electric field, E =
So, from the above relations, we can write the eqn for charge, q as:
q =
q =
Answer:
Explanation:
According to Coulomb's law, the magnitude of the force (F) between two objects with the same charge(+Q), separated a distance (d) apart, is defined as:
Here k is the Coulomb constant. The charge on each object is doubled, that is :