Mass is added to the cart by the addition of a wooden block that rests on top of it. When the force is increased to 4.0 newton's, the block falls off as the cart begins to accelerate. Why does it fall off when the force is increased to this level?
Correct answer: C. The mass of the cart becomes too large, and the load must be reduced for the cart to accelerate
- A. The force accelerating the cart becomes large enough so that the force of friction holding the block in place is overcome
- B. The force of friction holding the block in place becomes large enough to overcome the force accelerating the cart
- C. The mass of the cart becomes too large, and the load must be reduced for the cart to accelerate
- D. The acceleration becomes nonuniform with this force
Explanation
When the force applied reaches 4.0 newtons, the added mass of the block increases the total mass of the cart. This increase in mass requires a reduction in load for the cart to accelerate effectively, causing the block to fall off. The other options are incorrect because they do not accurately describe the relationship between force, mass, and acceleration in this specific situation.
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Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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