Question

elise has just fallen asleep on her couch. her dog astro is sitting on her back. astro is pushing down on elise with a force of 50 n. earths gravity is pulling down on elise with a force of 650 n. the couch is pushing up on elise with a force of 700 n. assume all other forces on elise are balanced. which statement describes the forces on elise? the forces are balanced, so there is no net force on elise. the forces are unbalanced, so there is a net force on elise.

Explanation:

Step1: Calculate the total downward - force

The total downward - force is the sum of the force exerted by the dog and the force of gravity on Elise. So, $F_{down}=50 + 650=700$ N.

Step2: Compare the total downward - force and the upward - force

The upward - force exerted by the couch is $F_{up}=700$ N. Since $F_{down}=F_{up}=700$ N, the net force on Elise is $F_{net}=F_{up}-F_{down}=700 - 700 = 0$ N. When the net force is 0 N, the forces are balanced.

Answer:

The forces are balanced, so there is no net force on Elise.