Question

true or false
true an object can experience multiple forces but not
false accelerate
true an object can be in motion but have zero net force
false
true an unbalanced force is not needed to change an
false objects motion
true when you push a wall, the wall pushes back on you with
false an equal and opposite force
true an objects intertia is determined by the size of the
false object

Explanation:

1. An object can experience multiple forces but not accelerate

According to Newton's second law \(F = ma\). If the net force \(F_{net}=0\) (even if there are multiple forces acting on the object, as long as their vector sum is zero), then \(a = 0\). For example, an object at rest on a table experiences gravitational force \(mg\) (down - ward) and normal force \(N\) (up - ward) with \(N=mg\), and it does not accelerate. So this statement is True.

2. An object can be in motion but have zero net force

From Newton's first law, an object in motion will stay in motion with a constant velocity (i.e., \(a = 0\)) if the net force acting on it is zero (\(F_{net}=0\)). For example, a spaceship moving in deep space with no external forces (or balanced forces) acting on it will continue its motion. So this statement is True.

3. An unbalanced force is not needed to change an object's motion

From Newton's second law \(F_{net}=ma\). If \(a
eq0\) (change in motion, either change in speed or direction), then \(F_{net}
eq0\). An unbalanced force is required to cause an acceleration (change in motion). So this statement is False.

4. When you push a wall, the wall pushes back on you with an equal and opposite force

According to Newton's third law, for every action, there is an equal and opposite reaction. When you exert a force \(F\) on the wall (action), the wall exerts a force \(-F\) on you (reaction). So this statement is True.

5. An object's inertia is determined by the size of the object

Inertia is determined by the mass of the object, not the size. Mass is a measure of inertia. For example, a small - mass object has less inertia than a large - mass object. So this statement is False.

Answer:

1. True
2. True
3. False
4. True
5. False