Free body diagrams

What does a free body diagram represent?

• The internal structure of an object

• All forces acting on an object

• The object's motion path

• The object's material composition

What type of quantity are forces?

• scalar

• numerical

• vector

• abstract

What do the arrows on free body diagrams represent?

• speed and velocity

• magnitude and direction

• power and displacement

• acceleration and momentum

What does the length of the arrow represent?

• magnitude

• direction

• speed

• momentum

If the net force is 0 the object is _________

• decelerating

• accelerating

• in motion

• motionless

A container is resting motionless on the ground. Which forces are acting on it, and how do their magnitudes compare?

• Only gravity, pulling it down

• Only the normal force, pushing it up

• Gravity pulling down and normal force pushing up, with equal magnitudes

• Gravity pulling down and normal force pushing up, with gravity having a greater magnitude

Friction always acts in what direction?

• in the direction of the greatest force.

• opposite the direction of motion

• in the direction of the smallest force

• in the same direction as the objects acceleration

A person pushes a box across a floor, causing it to speed up. How does the magnitude of the applied force compare to the magnitude of the friction force?

• The applied force is less than the friction force

• The applied force is equal to the friction force

• The applied force is greater than the friction force

• There is no friction force acting on the box

What type of force is along a string, rope, or chain that is attached to a suspended object.

• normal

• tension

• gravity

• friction

A container is suspended motionless by a crane. Which forces are acting on the container, and how do their magnitudes compare?

• Only tension, pulling up

• Only gravity, pulling down

• Gravity pulling down and tension pulling up, with gravity having a greater magnitude

• Gravity pulling down and tension pulling up, with equal magnitudes