According to the instructions for drawing free body diagrams, what does a longer arrow indicate?

A longer arrow indicates a stronger force.

A longer arrow indicates a weaker force.

A longer arrow indicates a smaller mass.

A longer arrow indicates a slower speed.

Which of the following best represents the free-body diagram for a skydiver who is falling downward and speeding up?

A downward arrow labeled 'gravity' and a smaller upward arrow labeled 'air resistance'.

A single upward arrow labeled 'gravity'.

A downward arrow labeled 'air resistance' and an upward arrow labeled 'gravity'.

Two equal arrows, one up and one down, both labeled 'gravity'.

Draw the free-body diagram for a rightward-moving car with locked wheels that is skidding to a stop. What are the forces present?

F_grav (down), F_norm (up), F_frict (left)

F_grav (up), F_norm (down), F_frict (right)

F_grav (down), F_norm (up), F_frict (right)

F_grav (down), F_norm (down), F_frict (left)

Which of the following best represents the free-body diagram for a freight elevator attached by a cable, being pulled upward, and slowing down, without touching the sides of the elevator shaft?

Two forces: an upward tension force from the cable and a downward gravitational force, with the tension force smaller than gravity.

Two forces: an upward tension force from the cable and a downward gravitational force, with the tension force larger than gravity.

Only one force: an upward tension force from the cable.

Two forces: an upward tension force from the cable and a downward gravitational force, with both forces equal in magnitude.

Look at the force diagrams below. Which diagram shows balanced forces?

The diagram with 25 N up, 25 N down, 15 N left, and 15 N right

The diagram with 25 N up, 25 N down, 15 N left, and 25 N right

What happens to moving objects when forces are balanced?

They continue to move with the same speed and direction

What happens when there are balanced forces acting on an object?

The object remains at rest or moves with constant velocity

Which of the following graphs represents an object remaining at rest under balanced forces?

A horizontal line on a position vs. time graph

A diagonal line on a position vs. time graph

A curved line on a position vs. time graph

A vertical line on a position vs. time graph

What do unbalanced forces cause objects to do?

Accelerate (speed up, slow down, or change direction)

When the unbalanced force is directed rightward, the object accelerates rightward. Which of the following is true?

The object moves to the right and speeds up