Forces

A force is described by its _____ and by the direction in which it acts.

• energy

• motion

• magnitude (size)

• matter

Force is measured in a unit called the ___.

• Newton

• Gram

• Meter

• Meters per Second

Friction acts in a direction ___ to the direction of the object's motion.

• together

• opposite

• perpendicular

• parallel

The ______ determines how and if an object will move.

• balanced force

• friction

• unbalanced force

• net force

Forces cause ___ changes in motion.

• all

• some

• no

A net force causes ____ change in an object's motion.

• no

• a

Balanced forces ___ the motion of an object

• change

• do not change

Newton's first law of motion states that an object will not experience a change in motion unless acted upon by a(n) ____ force.

• balanced

• unbalanced

Newton's third law of motion states that if one object exerts a force on another objet, then the second object exerts a force of equal strength in the same direction.

• True

• Faulse; the second object exerts a force of equal strength in the OPPOSITE direction.

To increase acceleration of an object, you reduce its mass or increase the applied force (Newton's Second Law).

• True

• Faulse; to increase acceleration of an object, you INCREASE its mass or applied force.