PHYSICS
posted by Laila .
A bolt drops from the ceiling of a train car that is accelerating northward at a rate of 3.15 m/s2.
What is the acceleration of the bolt relative to the train car?
I don't understand how to do this problem at all... and why isn't it zero? It seems if the train is going forward and the bolt is going backward at the same acceleration the acceleration should be zero?

acceleration is caused by forces.
After the bolt is released, the only force on it is gravity. Horizontally, acceleration is zero, there is no horizontal force on the bolt. Vertically, gravity is operating on it. 
. The problem statement, all variables and given/known data
A bolt drops from the ceiling of a train car that is accelerating northward at a rate of 3.50 m/s2.
(a) What is the acceleration of the bolt relative to the train car?
(b) What is the acceleration of the bolt relative to the Earth?
3. The attempt at a solution
(a)10.4 m/s2 at 19.7° to the south from the vertical
(b)9.8 m/s2 vertically downward
I don't understand why the acceleration in (a) is not vertically downward since it is relative to the train. As we could assume the train is not moving, then the motion should be vertically downward isn't?
Respond to this Question
Similar Questions

physics
A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Initially a car is 69 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s 2 . What is the speed … 
physics
A train is moving parallel and adjacent to a highway with a constant speed of 30 m/s. Ini tially a car is 44 m behind the train, traveling in the same direction as the train at 42 m/s and accelerating at 3 m/s2. What is the speed … 
physics
A train is moving parallel and adjacent to a highway with a constant speed of 25 m/s. Initially a car is 49 meters behind the train travelling in the same directionas the train at 37 m/s and accelerating at 4 m/s^2. What is the speed … 
Physics
A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Initially a car is 41 m behind the train, traveling in the same direction as the train at 39 m/s and accelerating at 4 m/s 2 . What is the speed … 
Physics
A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Ini tially a car is 60 m behind the train, traveling in the same direction as the train at 41 m/s and accelerating at 5 m/s2. What is the speed … 
Physics
A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Ini tially a car is 29 m behind the train, traveling in the same direction as the train at 38 m/s and accelerating at 2 m/s2. What is the speed … 
Physics
A train is moving parallel and adjacent to a highway with a constant speed of 28 m/s. Initially a car is 29 m behind the train, traveling in the same direction as the train at 42 m/s and accelerating at 3 m/s^2. What is the speed of … 
physics
A train is moving parallel and adjacent to a highway with a constant speed of 24 m/s. Initially a car is 48 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s 2 . What is the speed … 
physics
A train is moving parallel and adjacent to a highway with a constant speed of 24 m/s. Initially a car is 48 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s ^2 . What is the speed … 
Physics
A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Ini tially a car is 35 m behind the train, traveling in the same direction as the train at 36 m/s and accelerating at 4 m/s2. What is the speed …