Home › AP Physics C: Mechanics › Physics › Kinematics › The train slows from 30.0 km/h to a stop in 8.00…
The train slows from 30.0 km/h to a stop in 8.00 s. Its acceleration is about:
A+1.04 m/s squared
B-3.75 m/s squared
C-0.42 m/s squared
D-1.04 m/s squared
Answer & Solution
Correct answer: D. -1.04 m/s squared
1. Convert 30 km/h to m/s first.
2. The change divided by 8.00 s gives about -1.04.
3. The minus sign shows it opposes the motion.
_Source: OpenStax College Physics for AP Courses 2e, Chapter 2, Kinematics (CC BY 4.0)._
Related questions
Why does a heavier tennis racquet have the advantage? In a collision what is conserved is:A 70.0 kg goalie at rest catches a 0.150 kg puck moving at 35.0 m/s. His recoil velocity iA collision in which the objects stick together is called:A 0.500 kg object at 4.00 m/s hits a 3.50 kg object at rest elastically. The small object:Truly elastic collisions are achieved only with:A collision that conserves internal kinetic energy is called:Squids propel themselves like jellyfish and typically move at:An isolated system is one for which the net external force is: