Unit 2 Lessons 1-3 Quiz Review

Motion is a change in the ______________ of an object.

• size

• speed

• direction

• position

Which of these is an example of putting force on an object?

• hitting a baseball with a bat

• typing on a keyboard

• pushing dirt with a bulldozer

• all of these

What happens when two forces push or pull an object in the same direction?

• They cancel each other out completely.

• They become a stronger force in that direction

• They become a weaker force in that direction.

• They make the object move in the opposite direction.

A book is resting on a table. What kind of forces must be acting on the book?

• The book must not have any forces acting on it.

• The forces acting on the book must be balanced.

• The forces acting on the book must be very weak.

• The book must have an unbalanced force acting on it.

The force that pulls down is called _________.

• gravity

• balance

• unbalanced

• dynamometer

What happens to an object that has unbalanced forces acting on it?

• The object will get bigger.

• The motion of the object will change.

• The object will stay still.

• The object will break apart.

Which of these is an example of back-and-forth motion?

• a bowling ball rolling down a lane

• a pinwheel spinning around

• a child moving on a swing

• a top turning

If you kick a soccer ball forward, what kind of motion will it move with and why?

• motion in a line, because gravity pulls it down.

• circular motion, because gravity pushes it back

• back-and-forth motion, because the ball rolls as it moves

• motion in a line, because the ball moves in one direction away from your foot