Unit 3 Quiz #4 - Motion and Stability

A push or a pull that changes the object's velocity is called a ____.

• force

• scalar

• vector

• direction

The SI unit of force, named after the scientist who described the relationship between motion and force, is called the ____.

• Newton

• Einstein

• Curie

• Pasteur

Which of the following objects exerts a gravitational force?

• a. a bowling ball

• b. a book

• c. a feather

• d. All of the above

The combination of all of the forces acting on an object is called the ____.

• total force

• union of forces

• super force

• net force

If the net force acting on a stationary object is zero, then the object will ____.

• accelerate in the direction of the strongest force

• remain at rest

• begin moving backwards

• decelerate at a steady rate of speed

If the net force on an object is zero then the object has ____.

• reaction forces

• action forces

• balanced forces

• unbalanced forces

What type of force accelerates and does not cancel out completely?

• net force

• normal force

• balanced forces

• unbalanced force

What force opposes motion between two objects that are in contact?

• friction

• normal

• gravity

• applied

What force attracts a body toward the center of the earth?

• friction

• normal

• gravity

• applied

The force of a surface acting on an object (the opposing force of gravity) is called ____.

• friction

• normal

• gravity

• applied