1. Which of the following statements about Newton's Third Law is the most true?
a The forces acting upon two objects are dependent on the initial velocities of the objects
b The law of conservation of momentum is obeyed in all systems
c The two objects colliding will have a change in their masses, but not necessarily their velocities***
d The forces acting on two colliding objects are equal, but the effects of those forces on those objects may not be equal
2. Which of the following is the best definition of a closed system?
a A system in which there a no internal energy changes
b A system in which Newton's Laws are valid
c A system in which there are no external forces
d A system in which the law of conservation of momentum is not valid***
so what are the correct answers??? ._.
1. The most true statement about Newton's Third Law is:
d. The forces acting on two colliding objects are equal, but the effects of those forces on those objects may not be equal.
2. The best definition of a closed system is:
a. A system in which there are no internal energy changes.
1. The most true statement about Newton's Third Law is:
d) The forces acting on two colliding objects are equal, but the effects of those forces on those objects may not be equal.
To understand why this is the most true statement, let's first explain Newton's Third Law. Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that when two objects interact with each other, they exert equal and opposite forces on each other.
To derive the answer, let's analyze the other options:
a) The forces acting upon two objects are dependent on the initial velocities of the objects. This statement is not true because the forces between two objects are only dependent on the interaction between them, not on their initial velocities.
b) The law of conservation of momentum is obeyed in all systems. This statement may seem true at first, but it is a broader concept that goes beyond Newton's Third Law. While the conservation of momentum is related to Newton's Third Law, it is not the most specific or accurate statement about it.
c) The two objects colliding will have a change in their masses, but not necessarily their velocities. This statement is not true because the masses of the objects do not change as a result of the collision. The velocities may change, but the masses remain constant.
Therefore, the most true statement is option d) The forces acting on two colliding objects are equal, but the effects of those forces on those objects may not be equal. This statement accurately captures the essence of Newton's Third Law, emphasizing that the forces between two objects are balanced but the resulting effects on the objects may differ.
2. The best definition of a closed system is:
c) A system in which there are no external forces.
To understand this definition, let's break it down:
a) A system in which there are no internal energy changes. This definition refers to a concept called an isolated system, where there is no exchange of energy with the surroundings. However, a closed system can have internal energy changes as long as there are no external forces acting on it.
b) A system in which Newton's Laws are valid. While Newton's Laws hold true in a closed system, this definition doesn't fully capture the essence of a closed system as it encompasses more than just the validity of Newton's Laws.
d) A system in which the law of conservation of momentum is not valid. This definition is incorrect because a closed system does indeed follow the law of conservation of momentum.
Therefore, the best definition is option c) A system in which there are no external forces. In a closed system, the only forces acting on the system are internal forces, meaning there is no influence from external forces. This allows for the conservation of certain properties, such as energy and momentum, within the system.
you are incorrect on 1.
you are incorrect on 2.