What is the difference between velocity and acceleration? A.
Velocity describes an object's position and acceleration describes how fast it moves.
B.
Velocity is how fast an object moves and acceleration is the rate of change in velocity.
C.
Velocity is used to determine the magnitude of force acting on an object, and acceleration isn't.
D.
Velocity is a time-dependent property of an object, while acceleration is not.

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.