Select the object that has the most gravitational force. a sand grain a marble a bowling ball a tennis ball
2 answers:
Answer:
A bowling ball has the most gravitational force.
Explanation:
The magnitude of gravitational force depends on the product of two objects and the square of distance between them. Mathematically, it is given by :
So, it is clear from above relation that the force is directly proportional to the mass.
Out of given options, a bowling ball has greatest mass. It will have most gravitational force. So, the correct option is (c) "a bowling ball".
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The centripetal acceleration is
Explanation:
For an object in uniform circular motion, the centripetal acceleration is given by
where
v is the speed of the object
r is the radius of the circle
The speed of the object is equal to the ratio between the length of the circumference () and the period of revolution (T), so it can be rewritten as
Therefore we can rewrite the acceleration as
For the particle in this problem,
r = 2.06 cm = 0.0206 m
While it makes 4 revolutions each second, so the period is
Substituting into the equation, we find the acceleration:
Learn more about centripetal acceleration:
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Answer:
25000 V
Explanation:
The formula for potential is
V = Kq/r
Potential at B due to the charge placed at origin O
V1 = K q / OB
V1 = 10000 V
Potential at B due to the charge placed at A
V2 = K q / AB
V2 = 15000 V
Total potential at B
V = V1 + V2 = 10000 + 15000 = 25000 V
