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Elden [556K]
3 years ago
8

A solid uniform ball of mass 1.0 kg and radius 1.0 cm starts from rest and rolls down a 1.0-m high ramp. there is enough frictio

n on the ramp to prevent the ball from slipping as it rolls down. A). What is the forward speed of the ball when it reaches the bottom of the ramp?
B). What would be the forward speed of the ball if there were no friction on the ramp?
C). Since the ball starts from the Same Height in both cases, why is the speed different?
Physics
1 answer:
Luba_88 [7]3 years ago
4 0
The correct answer is A
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The field lines spread apart as we move away from the charge, and they point away from the charge

Explanation:

The electric field produced by a single-point positive charge is a radial field, whose strength is given by the equation

E=k\frac{Q}{r^2}

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k is the Coulomb's constant

Q is the magnitude of the charge

r is the distance from the charge at which the field is calculated

There are two pieces of information given by the field lines shown in the graph:

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  • The direction of the lines gives the direction of the electric field, which points away from the central charge. This is because the  direction of the electric field corresponds to the direction  of the force that a positive test charge would feel when immersed in the electric field: in this case, if we place a positive test charge in this field, then it would get repelled away from the central charge (remember that the electric force between two positive charges is repulsive), and therefore, the direction of the electric field is away from the central charge.

Learn more about electric field:

brainly.com/question/8960054

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