This table shows the weights of four different objects that are sitting on the floor.
Object
Weight (N)
1
25
2
33
3
16
4
8
A person tries to lift each object with a force of 18 N, upward. Which
statement is supported by the data in the table?
A. None of the objects will move, but the normal force on all of the
objects will increase.
B. All of the objects will move, and object 2 will accelerate upward
the fastest.
C. Objects 1 and 2 will not move, and objects 3 and 4 will accelerate
upward.
D. Objects 1 and 2 will move downward, and objects 3 and 4 will

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^.