Lynn rubs a balloon with a piece of wool, which causes the balloon to pick up some of the electric charges from the wool. Lynn then observes that the balloon temporarily sticks to a wall. After several seconds, the balloon falls to the ground. Which best describes the forces in this scenario?
Answer
A
The weak force causes the balloon to stick to the wall, and the strong force causes the balloon to fall to the ground.
B
The electromagnetic force causes the balloon to stick to the wall, and gravitational force causes the balloon to fall to the ground.
C
Gravitational force causes the balloon to stick to the wall, and electromagnetic force causes the balloon to fall to the ground.
D
The strong force causes the balloon to stick to the wall, and the weak force causes the balloon to fall to the ground.
Explanation
Rubbing the balloon with wool transfers electric charge, so the charged balloon attracts charges in the wall through the electromagnetic force. That attraction lets it stick temporarily. Gravity pulls the balloon downward, causing it to fall; the strong and weak forces do not explain these everyday effects.
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