Question
Balloon Rocket
A balloon rocket is made by attaching a balloon to a straw with tape. The straw is threaded onto a wire that is stretched across a room. When the air is released, the balloon travels in a direction opposite to the air flow, as shown.
Two investigations are planned with the balloon rockets. In the first investigation, a regular balloon rocket will be tested and a balloon rocket with five pennies attached to it will be tested. In the second investigation, two balloons will be attached to the same straw, facing each other. The air in these two balloons will be released at the same time. The supplies available for each investigation are shown.
A roll of tape, a spool of wire, a tape measure, pennies, a balloon pump, straws, a timer, a weighing scale, and three deflated balloons.Which scenario would provide the BEST evidence that an object subjected to balanced forces does not change its motion?
A.
The balloons do not move in both investigations before the air is released.
B.
The two balloons face each other in both investigations before air is released from them.
C.
In the first investigation, five pennies are attached to the balloon to see if it can move when air is released.
D.
In the second investigation, both balloons are released at the same time, but the rocket does not travel any distance.
A balloon rocket is made by attaching a balloon to a straw with tape. The straw is threaded onto a wire that is stretched across a room. When the air is released, the balloon travels in a direction opposite to the air flow, as shown.
Two investigations are planned with the balloon rockets. In the first investigation, a regular balloon rocket will be tested and a balloon rocket with five pennies attached to it will be tested. In the second investigation, two balloons will be attached to the same straw, facing each other. The air in these two balloons will be released at the same time. The supplies available for each investigation are shown.
A roll of tape, a spool of wire, a tape measure, pennies, a balloon pump, straws, a timer, a weighing scale, and three deflated balloons.Which scenario would provide the BEST evidence that an object subjected to balanced forces does not change its motion?
A.
The balloons do not move in both investigations before the air is released.
B.
The two balloons face each other in both investigations before air is released from them.
C.
In the first investigation, five pennies are attached to the balloon to see if it can move when air is released.
D.
In the second investigation, both balloons are released at the same time, but the rocket does not travel any distance.
Answers
GPT-4o mini
The scenario that would provide the BEST evidence that an object subjected to balanced forces does not change its motion is:
**D. In the second investigation, both balloons are released at the same time, but the rocket does not travel any distance.**
This scenario clearly illustrates that with balanced forces, the overall forces acting on the balloon rocket are equal and opposite, resulting in no net force. Consequently, the rocket does not change its motion (it does not move), which directly supports the concept of balanced forces.
**D. In the second investigation, both balloons are released at the same time, but the rocket does not travel any distance.**
This scenario clearly illustrates that with balanced forces, the overall forces acting on the balloon rocket are equal and opposite, resulting in no net force. Consequently, the rocket does not change its motion (it does not move), which directly supports the concept of balanced forces.