Read the following case and answer the following questios:
Two identical spring balances are placed horizontally on a table and connected by their hooks. One spring balance is fixed to an immovable object, while the other is pulled horizontally by hand. Before conducting the experiment, students predict the readings shown on both spring balances. The experiment is repeated several times by applying different magnitudes of force. Each time, both spring balances remain stationary and display the same reading.
Based on the above case study, answer the following questions.
Based on the above case study, answer the following questions.
1. A student claims that the spring balance fixed to the wall should show zero reading because it does not move. Another student claims that both spring balances should show the same reading.
Whose statement is scientifically correct?
Whose statement is scientifically correct?
2. A student concludes,
"Since both spring balances show equal readings, the forces cancel each other. Therefore, no force is acting anywhere in the system."
How would you evaluate this conclusion?
"Since both spring balances show equal readings, the forces cancel each other. Therefore, no force is acting anywhere in the system."
How would you evaluate this conclusion?
3. During one trial, both spring balances show a reading of \(12\ N\). What does this reading represent?
4. A student argues,
"The wall does not pull the spring balance because it is not a living object. Only the person pulling the balance applies a force."
Which statement best evaluates this argument?
"The wall does not pull the spring balance because it is not a living object. Only the person pulling the balance applies a force."
Which statement best evaluates this argument?