Force, Work and Energy

The SU unit of force is the

• kilogram (kg)

• gram (g)

• newton (N)

• slug (sg)

The force that acts with one or more other forces to produce mechanical equilibrium is called the

• resultant

• equilibrant.

• concurrent force.

• weight.

Which statement below represents completely balanced forces?

An example of a system in mechanical equilibrium is

• a child swinging at the playground.

• a car turning a corner.

• a freight train at a constant speed moving straight across the open plains.

• a meteor entering the earth's atmosphere.

Weight is

• a force.

• an intrinsic property of an object.

• always an equilibrant force.

• equivalent to mass.

Concurrent forces

• act through the same point.

• are the equilibrants of the other concurrent forces.

• are equal.

• are perpendicular within the system's reference frame.

Which of the following is not a mechanical force?

• tension

• compression

• shear

• gravity

Pinching one's fingers uses what kind of contact force?

• tension

• torsion

• shear

• compression

Air resistance is what kind of contact force?

• compression

• friction

• gravity

• shear

Another term for mechanical force is

• tensile force.

• contact force.

• torsion.

• shear force.