A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2,3,4,1 before returning to the horizontal track. At point 3:
A) its mechanical energy is a minimum
B) the forces on it are balanced
C) it is not accelerating
D) its speed is a minimum
E) it experiences a net upward force

Question

A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2,3,4,1 before returning to the horizontal track. At point 3: 
A) its mechanical energy is a minimum 
B) the forces on it are balanced 
C) it is not accelerating 
D) its speed is a minimum 
E) it experiences a net upward force

Quizplus · Accepted Answer

The Answer of A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2,3,4,1 before returning to the horizontal track. At point 3: 
A) its mechanical energy is a minimum 
B) the forces on it are balanced 
C) it is not accelerating 
D) its speed is a minimum 
E) it experiences a net upward force

A Rectangular Block Is Moving Along a Frictionless Path When