A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 10 N and it does not move. To start it moving, a second person pulls vertically upward on the box. If the coefficient of static friction is 0.4, what is the smallest vertical force for which the box moves?
A) 4 N
B) 10 N
C) 14 N
D) 25 N
E) 35 N

Question

A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 10 N and it does not move. To start it moving, a second person pulls vertically upward on the box. If the coefficient of static friction is 0.4, what is the smallest vertical force for which the box moves? 
A) 4 N 
B) 10 N 
C) 14 N 
D) 25 N 
E) 35 N

Quizplus · Accepted Answer

The Answer of A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 10 N and it does not move. To start it moving, a second person pulls vertically upward on the box. If the coefficient of static friction is 0.4, what is the smallest vertical force for which the box moves? 
A) 4 N 
B) 10 N 
C) 14 N 
D) 25 N 
E) 35 N

A Box with a Weight of 50 N Rests on a Horizontal