3 min read•june 18, 2024
👋 Welcome to the AP Physics Unit 5 FRQ () Answers. Have your responses handy as you go through the rubrics to see how you did!
⏱ Remember, the AP Physics 1 exam has 5 free-response questions, and you will be given 90 minutes to complete the FRQ section. (This means you should give yourself ~18 minutes to go through each practice FRQ.)
Identical blocks 1 and 2 are placed on a horizontal surface at points A and E, respectively, as shown. The surface is frictionless except for the region between points B and C, where the surface is rough. Beginning at time tA, Block 1 is pushed with a constant horizontal force from Point A to Point B by a mechanical plunger.
Upon reaching Point B, Block 1 loses contact with the plunger and continues moving to the right along the horizontal surface toward Block 2. Block 1 collides with and sticks to Block 2 at Point E, after which the two-block system continues moving across the surface, eventually passing Point F.
The system is reset and Block 1 is again released. The following conditions now exist:
Mass of Block 1 (kg) | Mass of Block 2 (kg) | (N/m) | Distance Between Each Letter | , µ |
5 | 3 | 825 | 1.2 | 0.15 |
In addition, there is no friction on the horizontal surface except for between letters B and C.
📄 Additional Resources
📄 Additional Resources
Conserved | Not Conserved | |
Momentum | x | |
Energy | x |
📄 Additional Resources