Understanding Forces

What is necessary for an object to move?

• The application of force

• A change in temperature

• An increase in size

• A decrease in weight

Which of the following is an example of a push force?

• Pulling a rope

• Closing a refrigerator door

• Lifting a book

• Dropping a ball

How do you open a refrigerator door?

• By lifting it

• By sliding it

• By pulling it

• By pushing it

What can force do to an object?

• Start its movement

• Change its color

• Increase its mass

• Make it invisible

Which of the following is NOT a contact force?

• Friction

• Gravity

• Tension

• Normal force

What is a characteristic of contact forces?

• They do not cause movement

• They are always invisible

• They require physical contact

• They act at a distance

Which force causes a pencil to fall to the ground?

• Tension

• Gravity

• Magnetic force

• Friction

What type of force is involved when a magnet attracts a pin?

• Contact force

• Non-contact force

• Frictional force

• Normal force

Which of the following is an example of a non-contact force?

• Magnetic force

• Pulling a rope

• Pushing a car

• Kicking a ball

What is the force that pulls leaves from a tree to the ground?

• Magnetic force

• Electrostatic force

• Gravity

• Buoyancy