Question 1
On a frictionless track, a 2.0 kg cart moves at +3.0 m/s and a 3.0 kg cart moves at −1.0 m/s. What is the velocity of the two-cart system's center of mass?
How much do the AP Physics C exams cost?
US$99 per exam in the US, US territories, Canada and DoWEA schools; US$129 elsewhere. Mechanics and E&M are two exams.
| US, territories, Canada | US$99 per exam |
|---|---|
| Elsewhere | US$129 per exam |
| Fee reduction | US$37 per exam for eligible students |
| On-time ordering | By November 13, 2026 |
Extra fees
- Late order, November 14, 2026, through March 12, 2027: US$40.
- Canceled or unused exam: US$40.
Try 2 questions
Question 2
A straight wire 0.30 m long lies along the x-axis and carries 4.0 A in the +x direction. The uniform magnetic field is B = (0.20 T)x̂ + (0.30 T)ŷ, with +z out of the page. What is the magnetic force on the wire?
FAQ
Do I pay twice to take both Physics C exams?
Yes. Mechanics and E&M are separate exams, each with its own fee.