Matter in Motion test

Friction causes moving objects to speed up and go faster.

• True

• False

A force can cause an object to start moving, stop moving or change direction

• True

• Flase

__________ is the force that attracts planets to the sun and keeps them in orbit

• friction

• motion

• gravity

• acceleration

__________ is the speed of an object as well as the direction in which it is traveling.

• velocity

• gravity

• acceleration

• friction

_____________ is the amount of matter or material in an object.

• mass

• gravity

• force

• weight

Oil is used in car engines to:

• increase friction

• decrease speed

• decrease velocity

• decrease friction

Friction causes moving objects to slow down or stop.

• True

• False

Smooth surfaces such as ice tend to cause greater friction

• True

• False

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

• There are no forces acting on the rock.

• The only force acting on the rock is directed toward the sidewalk.

• The forces acting on the rock are balanced.

• The sidewalk exerts an unbalanced force on the rock.

A toy train engine rests motionless on a track. One student begins pushing the engine to the right with a force of 2 newtons. At the same time, another student begins pushing the engine to the left with a force of 5 newtons. Which of the following best describes the resulting motion of the engine?

• It travels left at a constant speed.

• It travels left at an increasing speed.

• It travels right at a constant speed.

• It travels right at an increasing speed.