Forces

Question 1

What is air resistance?

Answer 1

The force on an object moving through the air that causes it to slow down (also known as drag).

Question 2

Define balanced forces.

Answer 2

Forces acting on an object that are the same size but act in opposite directions.

Question 3

What does it mean to compress an object?

Answer 3

To squash into a smaller space.

Question 4

What is a contact force?

Answer 4

A force that acts when an object is in contact with a surface, air, or water.

Question 5

What does it mean to deform an object?

Answer 5

To change shape.

Question 6

Define drag force.

Answer 6

The force acting on an object moving through air or water that causes it to slow down.

Question 7

What is a driving force?

Answer 7

The force that is pushing or pulling something.

Question 8

What is the elastic limit?

Answer 8

The point beyond which a spring will not return to its original length when the force is removed.

Question 9

Define electrostatic force.

Answer 9

The force acting between two charged objects.

Question 10

What does equilibrium mean?

Answer 10

Balanced.

Question 11

What is extension in physics?

Answer 11

The amount by which an object gets longer when a force is applied.

Question 12

What is a field in physics?

Answer 12

A region where something feels a force.

Question 13

Define friction.

Answer 13

The force that resists movement because of contact between surfaces.

Question 14

What is gravity?

Answer 14

A non-contact force that acts between two masses.

Question 15

What does Hooke’s Law state?

Answer 15

If you double the force on an object the extension will double.

Question 16

What is an interaction pair?

Answer 16

When two objects interact there is a force on each one that is the same size but in opposing directions.

Question 17

What is the unit of mass?

Answer 17

Kilogram (kg), symbol kg.

Question 18

What is lubrication?

Answer 18

A substance that reduces friction between surfaces when they rub together.

Question 19

Define magnetic force.

Answer 19

The force between two magnets, or a magnet and a magnetic material.

Question 20

What is mass?

Answer 20

The amount of matter (stuff) a thing is made up of.

Question 21

What is the unit of force?

Answer 21

Newton (N), symbol N.

Question 22

What is a newtonmeter?

Answer 22

A piece of equipment used to measure weight in newtons.

A newtonmeter is commonly used in physics to quantify force.

Question 23

Define non-contact force.

Answer 23

A magnetic, electrostatic, or gravitational force that acts between objects not in contact.

Non-contact forces can influence objects from a distance.

Question 24

What is a pull?

Answer 24

A type of force.

Pulling forces can cause an object to move towards the source of the force.

Question 25

What is a push?

Answer 25

A type of force. ## Footnote Pushing forces can cause an object to move away from the source of the force.

Question 26

What is a reaction in physics?

Answer 26

The support force provided by a solid surface like a floor. ## Footnote This force acts in response to the weight of an object resting on a surface.

Question 27

What are resistive forces?

Answer 27

Any forces that act to slow down a moving object. ## Footnote Examples include friction and air resistance.

Question 28

What does it mean if an object is streamlined?

Answer 28

Shaped to reduce resistance to motion from air or water. ## Footnote Streamlining is important in design for efficiency in movement.

Question 29

What is tension?

Answer 29

A stretching force. ## Footnote Tension is commonly experienced in ropes or cables under load.

Question 30

What are unbalanced forces?

Answer 30

Opposing forces on an object that are unequal. ## Footnote Unbalanced forces result in a change in motion.

Question 31

Define water resistance.

Answer 31

The force on an object moving through water that causes it to slow down (also known as drag). ## Footnote Water resistance is a type of resistive force affecting objects in fluids.

Question 32

What is weight in physics?

Answer 32

The force of the Earth on an object due to its mass. ## Footnote Weight is typically measured in newtons and is affected by gravity.

Question 33

What are contact forces?

Answer 33

Contact forces occur when objects are touching ## Footnote Examples include friction, tension, and normal force.

Question 34

What are non-contact forces?

Answer 34

Non-contact forces work at a distance ## Footnote Examples include gravitational force, electromagnetic force, and nuclear force.