Exploring Force and Motion

Which force pulls objects toward the center of the Earth?

• Magnetism

• Gravity

• Friction

• Electricity

What is the term for a push or pull on an object?

• Energy

• Force

• Mass

• Speed

Which factor increases when you add more weight to a moving cart?

• Mass

• Friction

• Gravity

• Speed

What is the unit used to measure speed?

• Kilograms

• Meters per second

• Newtons

• Liters

Which of the following best describes friction?

• A force that speeds up objects

• A force that slows down or stops motion

• A force that pulls objects together

• A force that changes direction

If a ball is rolling on a flat surface and eventually stops, which force is mainly responsible for stopping it?

• Gravity

• Friction

• Magnetism

• Electricity

A toy car moves faster on a smooth surface than on a rough surface. Which factor is causing this difference?

• Gravity

• Friction

• Mass

• Direction

If you double the mass of an object, what happens to the force needed to move it at the same speed?

• It stays the same

• It doubles

• It is cut in half

• It becomes zero

A student pushes a box across the floor. If the student pushes harder, what will most likely happen to the speed of the box?

• It will decrease

• It will stay the same

• It will increase

• It will stop

Which scenario best shows the effect of gravity?

• A magnet picking up a paperclip

• A ball falling off a table to the ground

• A car stopping at a red light

• A boat floating on water