If the size of the charge value is tripled for both of twopoint charges maintained at a constant separation, the mutual forcebet
1 answer:
Answer:
a) 9.0
Explanation:
The force between two point charges, obeys Coulomb's Law, which can be written as follows:
As it can be seen, if the separation between the charges remains the same, the new value of the force will be directly proportional to the product of the charges.
If both charges are tripled, the mutual force between them will be changed in a factor equal to 3.0*3.0 = 9.0
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Answer:
The Kinetic Energy INCREASE in the following situations:
a)A block slides down a frictionless incline:
e)A merry go round rotates faster due to the push by a person.
Explanation:
The energy kinetics is proportional to the square of the velocity:
We study the cases:
a)A block slides down a frictionless incline:
The gravity made a positive work and the box get a extra velocity, then the kinetics energy INCREASE
b)A box is pulled across a rough floor at constant speed:
The magnitude of the velocity does not change, so the kinetics energy does not change as well
c)A stone at the end of a string is whirled in a horizontal circle at constant speed:
The magnitude of the velocity does not change, so the kinetics energy does not change as well
d)A projectile approaches its maximum height:
If the projectile approaches its maximum height, its velocity approaches to zero. Then the kinetics Energy DECREASE
e)A merry go round rotates faster due to the push by a person.
Thanks to the push, the magnitude of the velocity INCREASE, so the kinetics energy INCREASE as well