Chapter 2 Motion and Forces Review

Which of the following is an example of rolling friction?

• your shoes on a sidewalk as you walk

• bike tires on the road as you ride

• a boat on the water as it sails

• two hand rubbing together

The force that ones surface exerts on another when the two rub against each other is called ____.

• friction

• acceleration

• gravity

• inertia

the product of an objects mass and velocity is called its ___.

• force

• acceleration

• momentum

• inertia

The achievement of lifting a rocket off the ground and into space can be explained by _______.

• Newton's first law

• Newton's second law

• Newton's third law

• the law of conservation of momentum

Any force that causes an object to move in a circle is called a(an) ______.

• balanced forces

• unbalanced forces

• gravitational forces

• centripetal forces

In physical science, a push or a pull is called a(an) ____.

• acceleration

• force

• inertia

• motion

How can you increase the momentum of an object?

• by decreasing its velocity

• by increasing its mass

• by increasing its friction

• by decreasing its acceleration

The SI unit for force is the _____.

• newton

• meter

• kilogram

• pound

Balanced forces acting on an object ____.

• always change the object's motion

• sometimes change the objects motion

• never change the object's motion

• are not related to motion

When an object's distance from another object is changing, ____.

• it is in motion

• it is speeding

• it has a high velocity

• it is accelerating