A mobile phone is pulled northward by a force of 10 N and at the same time pulled southward by another force of 15 N. The resultant force on the phone is
A)0 N.
B)5 N.
C)25 N.
D)150 N.

Question

Quizplus · Accepted Answer

The resultant force is calculated by subtracting the smaller force from the larger force, in the direction of the larger force. In this case, the southward force of 15 N is larger, so we subtract the northward force of 10 N from it to get a resultant force of 5 N southward. Therefore, the correct answer is B) 5 N.

A Mobile Phone Is Pulled Northward by a Force of 10