Question

b)A boy pulls a rope in the east direction exerting a force of 140N and another boy pulls the same rope in the west direction exerting a force of 120N.Calculate the net Resultant Force. (3)​

Answer 1

Answer:

20N

Explanation:

Resultant force is nothing but the total force acting on a body including their directions. If the object is at rest or it moves with a same velocity, the resultant force should be zero. All forces are acting on same direction, resultant force should be the sum of all the forces.

In this case, two boys exert forces of 140N and 120N in opposite directions on an object. This means that one force goes with a plus sign and the other force goes with the minus sign.

That is, $f_{r} = f_{1} - f_{2}$

$f_{r}$ = 140 - 120

$f_{r}$ = 20 N

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