Introduction to Forces

Multiple Choice

A force interaction requires at least a _______.

• single force.

• pair of forces.

• reaction force.

• action force.

Multiple Choice

Friction is a force like any other force and affects motion. Friction occurs in ______.

• solids sliding over one another.

• air.

• fluids.

• All of the above.

Open Ended

Does a 2-kilogram bunch of bananas have twice as much inertia as a 1-kilogram loaf of bread? Twice as much mass?

Multiple Choice

When a net force acts on an object, its acceleration depends on the object’s _______.

• initial speed.

• volume.

• mass.

• weight.

Multiple Choice

A system undergoes acceleration only when acted on by a ______.

• net force.

• action and reaction forces.

• pair of forces.

• internal interactions.

Multiple Choice

If a net force acts on a horse while it is pulling a wagon, What will happen to the horse?

• The horse will accelerates.

• The horse will not move.

• The Horse will be restrained.

• The horse will be pulled backward by an equal and opposite net force.

Multiple Choice

If gravity between the sun and Earth suddenly vanished, Earth would continue moving in a(n) __________

• curved path

• straight-line path

• outward spiral path

• inward spiral path