Force and Motion Retest
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Question
Megan left her wagon outside while it was raining and it filled with water. When Megan tried to move the wagon that afternoon, she failed to budge the wagon. Why did Megan's wagon become hard to move?
Responses
The rainwater decreased the force of gravity pushing on the wagon, increasing the force needed to move it.
The rainwater decreased the force of gravity pushing on the wagon, increasing the force needed to move it.
The rainwater decreased the force of friction pulling on the wagon, decreasing the force needed to move it.
The rainwater decreased the force of friction pulling on the wagon, decreasing the force needed to move it.
The rainwater increased the mass of the wagon, decreasing the amount of force needed to move it.
The rainwater increased the mass of the wagon, decreasing the amount of force needed to move it.
The rainwater increased the mass of the wagon, increasing the amount of force needed to move it.
The rainwater increased the mass of the wagon, increasing the amount of force needed to move it.
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The correct response is:
The rainwater increased the mass of the wagon, increasing the amount of force needed to move it.
ARE YOU SURE
Yes, I am sure. When the wagon fills with water, the additional mass of the water increases the overall mass of the wagon. According to Newton's second law of motion, F = ma, where F represents force, m represents mass, and a represents acceleration. As the mass of the wagon increases, more force is required to accelerate or move the wagon. Therefore, the rainwater increases the mass of the wagon, increasing the amount of force needed to move it.
To determine why Megan's wagon became hard to move, we need to understand the concept of force and motion. Force is a push or a pull, and it is required to move objects. In this scenario, the rainwater is the variable that affected the wagon's movability.
Let's evaluate the given responses:
1) The rainwater decreased the force of gravity pushing on the wagon, increasing the force needed to move it.
2) The rainwater decreased the force of friction pulling on the wagon, decreasing the force needed to move it.
3) The rainwater increased the mass of the wagon, decreasing the amount of force needed to move it.
4) The rainwater increased the mass of the wagon, increasing the amount of force needed to move it.
To understand which response is correct, we need to analyze the effects of rainwater on force and motion. Rainwater would not decrease or affect the force of gravity; therefore, options 1 and 2 can be ruled out.
Rainwater adding mass to the wagon would increase the total mass of the wagon, but it would not directly affect the force required to move it. So, option 3 can also be ruled out.
According to Newton's second law of motion, force is equal to mass times acceleration (F = ma). The mass increase due to rainwater would not directly affect the force needed to move the wagon. Therefore, option 4 can also be eliminated.
Based on this analysis, none of the given responses accurately explain why Megan's wagon became hard to move. It could be attributed to the rainwater creating additional friction between the wagon and the ground. This increased friction would require more force to overcome and move the wagon.
In conclusion, the correct answer is not provided among the given options.