The scenario described, where a girl slides down a plastic slide and her hair sticks up as she exits, is an example of Friction. This happens because the motion of her body against the plastic slide causes charges to transfer between the two materials, leading to a buildup of static electricity.
There are different methods to electrically charge an object. A girl slides down a plastic slide and her hair sticks up as she exits the bottom of the slide. This is an example of which method of building up an electric charge?(1 point)
Responses
Neutralization
Friction
Friction
Induction
Induction
Conduction
Conduction
11 answers
A teacher places a metal can on top of an insulating foam cup and touches the side of the foam cup with a negatively charged rod. The setup is shown in the picture below.
What will happen to the negatively charged electrons when the rod touches the metal can?
(1 point)
Responses
The electrons will transfer to the foam cup because it is an insulator.
The electrons will transfer to the foam cup because it is an insulator.
The electrons will transfer to the foam cup because it is a conductor.
The electrons will transfer to the foam cup because it is a conductor.
The electrons will transfer to the can because it is an insulator.
The electrons will transfer to the can because it is an insulator.
The electrons will transfer to the can because it is the conductor.
The electrons will transfer to the can because it is the conductor.
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What will happen to the negatively charged electrons when the rod touches the metal can?
(1 point)
Responses
The electrons will transfer to the foam cup because it is an insulator.
The electrons will transfer to the foam cup because it is an insulator.
The electrons will transfer to the foam cup because it is a conductor.
The electrons will transfer to the foam cup because it is a conductor.
The electrons will transfer to the can because it is an insulator.
The electrons will transfer to the can because it is an insulator.
The electrons will transfer to the can because it is the conductor.
The electrons will transfer to the can because it is the conductor.
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The correct response is:
The electrons will transfer to the can because it is the conductor.
When the negatively charged rod touches the metal can, which is a conductor, the excess electrons will be transferred from the rod to the can. The electrons will distribute evenly across the surface of the metal can because it is conductive.
A student has an object with a charge of -3 Coulombs. Which of the following objects would have the strongest attraction to object A?(1 point)
Responses
An object with a -4 charge at a distance of 2 cm
An object with a -4 charge at a distance of 2 cm
An object with a +3 charge at a distance of 5 cm
An object with a +3 charge at a distance of 5 cm
An object with a -3 charge at a distance of 5 cm
An object with a -3 charge at a distance of 5 cm
An object with a +3 charge at a distance of 2 cm
Responses
An object with a -4 charge at a distance of 2 cm
An object with a -4 charge at a distance of 2 cm
An object with a +3 charge at a distance of 5 cm
An object with a +3 charge at a distance of 5 cm
An object with a -3 charge at a distance of 5 cm
An object with a -3 charge at a distance of 5 cm
An object with a +3 charge at a distance of 2 cm
The object with the strongest attraction to the charged object (-3 Coulombs) would be:
An object with a +3 charge at a distance of 2 cm.
Attraction occurs between opposite charges, and the force of attraction is also influenced by the distance between the charges. In this case, the +3 charge is closer (2 cm) compared to the +3 charge at 5 cm. According to Coulomb's Law, the force of attraction increases as the distance decreases, so the +3 charge at 2 cm will have the strongest attraction to the -3 charge.
A teacher holds two negatively charged balloons apart as shown in the picture. What will happen if the teacher bring together these charged objects?
(1 point)
Responses
The electrostatic force will increase in strength and the balloons will attract each other.
The electrostatic force will increase in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will repel each other.
The electrostatic force will decrease in strength and the balloons will repel each other.
The electrostatic force will increase in strength and the balloons will repel each other.
The electrostatic force will increase in strength and the balloons will repel each other.
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(1 point)
Responses
The electrostatic force will increase in strength and the balloons will attract each other.
The electrostatic force will increase in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will attract each other.
The electrostatic force will decrease in strength and the balloons will repel each other.
The electrostatic force will decrease in strength and the balloons will repel each other.
The electrostatic force will increase in strength and the balloons will repel each other.
The electrostatic force will increase in strength and the balloons will repel each other.
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The correct response is:
The electrostatic force will increase in strength and the balloons will repel each other.
Since both balloons are negatively charged, they will repel each other due to the electrostatic force. As the teacher brings the balloons closer together, the magnitude of the electrostatic force between them increases, but they will continue to repel each other.
Which is NOT a way to increase the gravitational force between the two objects in the picture?
(1 point)
Responses
Increase the distance between the objects
Increase the distance between the objects
Decrease the distance between the objects
Decrease the distance between the objects
Increase the mass of both objects
Increase the mass of both objects
None of the options above
None of the options above
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(1 point)
Responses
Increase the distance between the objects
Increase the distance between the objects
Decrease the distance between the objects
Decrease the distance between the objects
Increase the mass of both objects
Increase the mass of both objects
None of the options above
None of the options above
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The response that is NOT a way to increase the gravitational force between the two objects is:
Increase the distance between the objects.
According to Newton's law of universal gravitation, the gravitational force between two objects decreases as the distance between them increases. Therefore, increasing the distance would reduce the gravitational force, not increase it. The other options correctly describe ways to increase the gravitational force.
On Earth, when you pick up a bowling ball from the ground it feels very heavy and takes a lot of force to lift it. However on the moon the bowling ball feels lighter and easier to pick up. Why does a bowling ball feel easier to pick up on the moon than on Earth(1 point)
Responses
The mass of the bowling ball is greater on the moon than on Earth
The mass of the bowling ball is greater on the moon than on Earth
The mass of the bowling ball is less on the moon than on Earth
The mass of the bowling ball is less on the moon than on Earth
The weight of the bowling ball is greater on the moon than on Earth
The weight of the bowling ball is greater on the moon than on Earth
The weight of the bowling ball is less on the moon than on Earth
Responses
The mass of the bowling ball is greater on the moon than on Earth
The mass of the bowling ball is greater on the moon than on Earth
The mass of the bowling ball is less on the moon than on Earth
The mass of the bowling ball is less on the moon than on Earth
The weight of the bowling ball is greater on the moon than on Earth
The weight of the bowling ball is greater on the moon than on Earth
The weight of the bowling ball is less on the moon than on Earth
The correct response is:
The weight of the bowling ball is less on the moon than on Earth.
The bowling ball has the same mass both on Earth and on the Moon, but weight is a measure of the force of gravity acting on an object. Since the gravitational force on the Moon is about 1/6th that of Earth's gravitational force, the weight of the bowling ball is significantly less on the Moon, making it easier to lift.