Jennifer is able to drag her brother out of the zoo due to an applied net force of 15 N.
Force refers to any agent which tends to cause a change in the motion or state of an object.
Forces are of two types;
The net force is the difference between two forces which causes a change in the motion of an object.
The net force that Jennifer applies = 35 N - 20 N = 15 N
Therefore, Jennifer is able to drag her brother out of the zoo due to an applied net force of 15 N.
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