Question 1
Cart A, of mass 1.0 kg, rolls toward cart B, which is at rest on a frictionless track. The graph shows the position of each cart against time; they collide at t = 2.0 s and move together afterward. What is the mass of cart B?
For the May 2027 exams the fee is US$99 at schools in the US, US territories, Canada and DoWEA schools, and US$129 at schools everywhere else.
| 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 |
College Board takes US$37 off each exam for students who qualify for a fee reduction, and schools and states may add their own help. Ask your AP coordinator what applies to you.
US$99 at schools in the US, US territories, Canada and DoWEA schools, and US$129 elsewhere, for exams ordered on time.
College Board gives a US$37 fee reduction per exam to eligible students, and schools and states may reduce the cost further.
Schools order exams by November 13, 2026 without a late fee. Your school may set an earlier date.