Question

1. when an object is accelerating due to the force of gravity with no other forces acting on it, it is:

a. changing direction.
b. motionless.
c. in free fall.
d. at terminal speed.

1. if a force vector acting in a northeast direction is resolved into its components, any vector acting in the north - south direction would be called a(n):

a. hypotenuse.
b. x - component.
c. y - component.
d. resultant.

Explanation:

5.

When an object is accelerating due to the force of gravity with no other forces acting on it, by the definition of free - fall, this is the state of free - fall. An object in free - fall is only under the influence of gravity. A motionless object has no acceleration, an object at terminal speed has no net acceleration (air resistance equals gravity), and there is no information given about direction change in the problem statement for this case.

When resolving a vector (in this case, a force vector) into components, if we consider a coordinate system where the \(x\) - axis is east - west and the \(y\) - axis is north - south. A vector acting in the north - south direction is the \(y\) - component of the vector. The hypotenuse is the magnitude of the original vector (not a component), the \(x\) - component is in the east - west direction, and the resultant is the original vector (not a component).

Answer:

c. in free fall.

12.