Each of the following statements has 1, 2, or 3 conceptual flaws. Explain what is wrong with each sentence (I just need help finding a website for this)
1. A rocket moves through space because the exhaust from the rocket's engine pushes against the atmosphere.
2. If an unbalanced force in opposition to the motion of an object were applied for a sufficiently long time, the inertia of the object would reach zero
3. The number of oscillations made by an intertial balance in 8 seconds is inversely proportional to the horizontal component of the weight placed on the tray of the balance.
4. According to Newton's 3rd Law of Motion, if a small steel ball were thrown horizontally and bounced off the center of a large steel ball, which had been sitting motionless on a frictionless surface, both balls would accelerate at the same rate, but in opposite directions, after the impact.
5. The force due to gravity is the same on all objects near the surface of the earth.
6. The apparent snapping back of my head, when I throw the trunk of my body forward is a physical reality of Newton's 3rd law of motion.
7. An object will accelerate when any force acts on it, and that acceleration will be directly proportional to the mass of the object, according to Newton's first law of motion
Any help would be greatly appreciated!
1. What does Newtons third law say? Does it require an atmosphere?
2. What does Newtons second law say?
3. Weight? Wont an inertial balance work in a gravity free environment?
4. I don't recall the third law saying this, it does mention momentum reactions.
5. My daughters weight is different from mine.
6. Hmmm. Then what does the first law say?
7. I don't recall the first law saying this.
7. Here's one more clue to add to the many Bob has given you.
Since Newton's second law says F = ma, a = F/m
So the acceleration (a) is NOT directly proportional to mass (m).
To find a suitable website to help you analyze the flaws in each statement, you can start by conducting a search on a reliable search engine like Google. Simply enter a search query such as "Explanation of conceptual flaws in physics statements" or "Common misconceptions in physics statements." This will provide you with a range of websites and resources where you can find explanations for the inaccuracies in each statement.
It is always important to critically evaluate the credibility and accuracy of the sources found. Look for reputable educational institutions, scientific articles, or physics textbooks as primary sources. Additionally, online forums and communities of physicists may provide valuable insights.
Let's briefly discuss the flaws in each statement:
1. A rocket moves through space because the exhaust from the rocket's engine pushes against the atmosphere.
Flaws: Rockets move through space primarily due to the principle of action and reaction (Newton's third law). The exhaust gases expelled by the rocket push it forward, not against the atmosphere.
2. If an unbalanced force in opposition to the motion of an object were applied for a sufficiently long time, the inertia of the object would reach zero.
Flaws: Inertia is an inherent property of matter and quantifies its resistance to changes in motion. Applying a force cannot reduce the inertia of an object to zero; it can only cause a change in its motion.
3. The number of oscillations made by an inertial balance in 8 seconds is inversely proportional to the horizontal component of the weight placed on the tray of the balance.
Flaws: The number of oscillations of an inertial balance is not directly related to the weight or any horizontal component. Instead, the number of oscillations depends on the stiffness of the spring and the mass involved.
4. According to Newton's 3rd Law of Motion, if a small steel ball were thrown horizontally and bounced off the center of a large steel ball, which had been sitting motionless on a frictionless surface, both balls would accelerate at the same rate, but in opposite directions, after the impact.
Flaws: After the impact, both balls would experience equal and opposite forces as per Newton's third law. However, their accelerations would differ due to their varying masses (Newton's second law).
5. The force due to gravity is the same on all objects near the surface of the earth.
Flaws: The force of gravity acting on an object near the Earth's surface depends on the mass of the object. Heavier objects experience a greater force of gravity compared to lighter objects.
6. The apparent snapping back of my head when I throw the trunk of my body forward is a physical reality of Newton's 3rd law of motion.
Flaws: The physical reaction you observe is not solely a result of Newton's third law. It is the conservation of linear momentum that explains why your head snaps backward when you throw your body forward.
7. An object will accelerate when any force acts on it, and that acceleration will be directly proportional to the mass of the object, according to Newton's first law of motion.
Flaws: Newton's first law (the law of inertia) states that an object at rest or in motion with a constant velocity will not change its state unless acted upon by a net external force. Acceleration is not directly proportional to the mass but depends on the magnitude of the applied force and the mass (Newton's second law).