they are equal.

1. Közösség
2. Study Group
3. MATH NEED HELP

yes it is very easy just go to settings on android and on laptop it is directly visible  

1. Közösség
2. General Khan Academy Questions
3. Progress report

yes , but in question it would be given that which direction to take+ and-

1. Közösség
2. Study Group
3. Motion(physics)

first mass of all objects are not same.  use force = mass * acceleration.  

1. Közösség
2. Study Group
3. Physics Help