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Introduction: Suppose you tried to balance a hammer on one finger. If you placed your finger halfway down the handle, the hammer would fall because the head is much heavier than the rest of the hammer. Instead, you would have to place your finger near the head to balance the hammer perfectly. The point where an object balances is called its center of mass Question: How can you find the center of mass of a system? 1. Identify. The center of mass for the system of two pucks is where the balancing point would be if a weightless rod connected the pucks. Set the mass of both pucks to 5.0 kg- What do you think are the coordinates of the center of mass of the two pucks? 2. Compare: Click Play. The teal blue trail represents the trail of the system's center of mass. How does the center of mass trail compare to the trails of the two pucks? 3. Observe Click Reset. Change the Blue puck mass to 10.0 kg. Click Play. How did this affect the center of mass?

Introduction: Suppose you tried to balance a hammer on one finger. If you placed your finger halfway down the handle, the hammer would fall because the head is much heavier than the rest of the hammer. Instead, you would have to place your finger near the head to balance the hammer perfectly. The point where an object balances is called its center of mass Question: How can you find the center of mass of a system? 1. Identify. The center of mass for the system of two pucks is where the balancing point would be if a weightless rod connected the pucks. Set the mass of both pucks to 5.0 kg- What do you think are the coordinates of the center of mass of the two pucks? 2. Compare: Click Play. The teal blue trail represents the trail of the system's center of mass. How does the center of mass trail compare to the trails of the two pucks? 3. Observe Click Reset. Change the Blue puck mass to 10.0 kg. Click Play. How did this affect the center of mass?

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**Activity C: Center of Mass** **Instructions:** 1. **Get the Gizmo Ready:** - Click **Reset**. Turn on **Center of mass trail**. - Move the blue puck to point (-4.0, 6.0). Set its initial velocity to x = 3.0 m/s, y = 6.0 m/s. - Move the gold puck to point (4.0, 6.0). Set its initial velocity to x = -3.0 m/s, y = 6.0 m/s. **Introduction:** Suppose you tried to balance a hammer on one finger. If you placed your finger halfway down the handle, the hammer would fall because the head is much heavier than the rest of the hammer. Instead, you would have to place your finger near the head to balance the hammer perfectly. The point where an object balances is called its **center of mass**. **Question: How can you find the center of mass of a system?** 1. **Identify:** The center of mass for the system of two pucks is where the balancing point would be if a weightless rod connected the pucks. Set the mass of both pucks to 5.0 kg. What do you think are the coordinates of the center of mass of the two pucks? ________ 2. **Compare:** Click **Play**. The teal blue trail represents the trail of the system’s center of mass. How does the center of mass trail compare to the trails of the two pucks? _______________________________________________________________ _______________________________________________________________ 3. **Observe:** Click **Reset**. Change the **Blue puck mass** to 10.0 kg. Click **Play**. How did this affect the center of mass? _______________________________________________________________ **Graph Explanation:** The graph displays the positions of two pucks, one blue and one gold, on a coordinate plane. The trails indicate the paths these pucks take, and a teal blue trail shows the movement of the system's center of mass.
Transcribed Image Text:**Activity C: Center of Mass** **Instructions:** 1. **Get the Gizmo Ready:** - Click **Reset**. Turn on **Center of mass trail**. - Move the blue puck to point (-4.0, 6.0). Set its initial velocity to x = 3.0 m/s, y = 6.0 m/s. - Move the gold puck to point (4.0, 6.0). Set its initial velocity to x = -3.0 m/s, y = 6.0 m/s. **Introduction:** Suppose you tried to balance a hammer on one finger. If you placed your finger halfway down the handle, the hammer would fall because the head is much heavier than the rest of the hammer. Instead, you would have to place your finger near the head to balance the hammer perfectly. The point where an object balances is called its **center of mass**. **Question: How can you find the center of mass of a system?** 1. **Identify:** The center of mass for the system of two pucks is where the balancing point would be if a weightless rod connected the pucks. Set the mass of both pucks to 5.0 kg. What do you think are the coordinates of the center of mass of the two pucks? ________ 2. **Compare:** Click **Play**. The teal blue trail represents the trail of the system’s center of mass. How does the center of mass trail compare to the trails of the two pucks? _______________________________________________________________ _______________________________________________________________ 3. **Observe:** Click **Reset**. Change the **Blue puck mass** to 10.0 kg. Click **Play**. How did this affect the center of mass? _______________________________________________________________ **Graph Explanation:** The graph displays the positions of two pucks, one blue and one gold, on a coordinate plane. The trails indicate the paths these pucks take, and a teal blue trail shows the movement of the system's center of mass.
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