When you click "Send" (at the bottom of this page), your answers will be emailed to sciworks@pa.uky.edu. However, you need to be connected to the internet for this to work.
Hannah is weighing a cantaloupe, using a weightless scale. There are many different forces involved, including FA is the force Hannah exerts on the scale FB is the force the scale exerts on Hannah FC is the force the scale exerts on the cantaloupe FD is the force gravity exerts on the cantaloupe
These forces are all equal to each other, but for differing reasons.
1. Which pair is an example of "balanced forces," that are equal as a direct consequence of the Law of Inertia (Newton's First Law)? FA and FB FB and FC FC and FD FA and FC
2. Which pair is an example of forces that are equal as a direct consequence of the Law of Interaction (Newton's Third Law)? FA and FB FB and FC FC and FD FA and FC
3. Real scales have weight. Suppose gravity is pulling on the scale with a force 0.5 Newton. What will be the consequence? FA will increase by 0.5 Newton, according to the Law of Inertia. FA will increase by 0.5 Newton, according to the Law of Interaction. FA will decrease by 0.5 Newton, according to the law of Inertia. FA will decrease by 0.5 Newton, according to the law of Interaction. There will be an opposite 0.5 Newton force acting on the scale, according the Law of Interaction.
4. Discussion question: In one of the activities, we found that a force is needed to hold an object on an incline, and that the force is less than the weight of the object. Give three everyday examples of situations in which this is useful -- or inconvenient.
This box is for other comments.
Click here to . Click here to start over.