Question

147 Newton's Third Law Pre-Lab: Newton's Third Law and Conservation of Momentum Section: Name. 1. What is Newton's Third Law? Far ever actioh there is omenu an u 2. A person jumps straight up. While they are pushing against the ground with their feet, is the normal force of the ground against their feet larger, smaller, or the same as their weight. Does this conflict with Newton's Third Law? smaer, benu'e then he covdntrp 3. How could you measure the average momentum of an object using a velocity-time graph? Is there any other pice of information that you would need?

Answer 1

1. According to Newton's third law, for every action, there is an equal and opposite reaction. According to this law, forces always come into pair. If an abject A exert a force on another object B, then object B will exert equal and opposite force on the object A at same the moment. 2. No, this does not conflict the Newton's third law, it will follow the Newton's third law of motion. If the person is standing on the ground, there will be a normal force exerted by the ground that will be equal to the weight of the person. But, when person jumps straight up, then the person exert some force on the ground which is additional force to its weight for the net downward force. Therefore, for this condition, the normal force will be greater than the weight of the person. This condition satisfies the Newton's third law because in this condition for the action force (net downward force), there is an equal and opposite reaction force (normal force).

The value of the total displacement can be calculated by the velocity-time graph. After calculating the value of the displacement, the average velocity can be calculated by taking the ratio of total displacement and time interval. Then, after calculating the value of the average velocity, the average momentum can be calculated by multiplying the average velocity by the mass. No, there is no need of any other information.