The graph depicts the velocity of an unmanned wheeled cart over time. Two opposing forces acted on the cart during the course of the investigation. What is the BEST conclusion as supported by the data in the graph?
A) The forces are consistently equal
B) The forces are consistently unequal
C) The forces were equal, then became unequal
D) The forces were unequal, then became equal
Chemistry question, please help?
回答 (2)
2017-10-22 11:37 pm
In the first section, the velocity in decreasing uniformly. The cart is decelerating (a < 0).
F = ma. Due to a ≠ 0, there is a non-zero resultant force acting on the cart.
Hence, the forces were unequal in the first section.
In the second section, the velocity is constant, and thus acceleration = 0.
F = ma. Due to a = 0, the resultant force acting on the cart = 0
Hence, the forces were equal in the second section.
Answer: D) The forces were unequal, then became equal,
F = ma. Due to a ≠ 0, there is a non-zero resultant force acting on the cart.
Hence, the forces were unequal in the first section.
In the second section, the velocity is constant, and thus acceleration = 0.
F = ma. Due to a = 0, the resultant force acting on the cart = 0
Hence, the forces were equal in the second section.
Answer: D) The forces were unequal, then became equal,
2017-10-22 11:33 pm
D) The forces were unequal, then became equal
收錄日期: 2021-04-18 17:55:32
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