Balloon behavior during car braking · CAP 2004 #Q20
Physics · mechanics
Problem
You are travelling at constant speed in an airtight car with a balloon floating motionless next to you. Suddenly, you slam on the brakes so as to stop the car quickly. During deceleration, with respect to the car the balloon
(a) moves forward; (b) remains motionless;
(c) moves backward; (d) can move forward or backward.