Which statement best summarizes the central idea of “Applications of Newton’s Laws”?Newton’s laws can explain the forces that occur between objects every day.Newton’s laws are useful for explaining why we should make good decisions.People should use caution when moving objects, due to objects’ inertia.Newton’s laws are outdated and cannot be used for present-day problems and situations.
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Describe the real-world examples of Newton's third law that were identified in “Applications of Newton's Laws.”
Real-world examples of Newton’s third law include rocket propulsion and the formation of mountains. When a rocket’s engines fire, gas is pushed downward out of the tail, which results in an equal and opposite force pushing the rocket upward. Similarly, when tectonic plates or layers of the Earth collide, they exert equal and opposite forces on each other, which can force the Earth upward and lead to the formation of mountains.
Thalia is drafting a plan to move a large, perfect sphere concrete sculpture that is in front of her office building. Describe the considerations Thalia would need to make if she was drafting a plan to move the sculpture.
Thalia must consider Newton's three laws of motion. First, the sculpture has inertia, so a significant unbalanced force is needed to overcome its tendency to remain at rest (First Law). Second, the amount of force required depends on the sculpture's mass and the desired acceleration, calculated using F=ma (Second Law). Third, whatever force she applies to the sculpture, the sculpture will exert an equal and opposite force back on the mover or moving equipment (Third Law).
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Sample Response: Thalia would need to consider that the sculpture's inertia is keeping the object in place. Newton's first law applies to this situation. The inertia would have to be overcome to enable the sculpture to move, but the inertia would also keep the sculpture moving after its movement was started. The force that is required to move the sculpture would depend on the mass and acceleration at which Thalia wanted the sculpture to move. Finally, any force applied to the sculpture would be
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