Forces and Speed

Question 1

What force acts on an object as it moves through the air - slowing it down?

Answer 1

Air Resistance (also known as drag)

Question 2

To squash into a smaller space is to…

Answer 2

Compress

Question 3

Contact force is…

Answer 3

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

Question 4

Deform is to change shape. True/False

Answer 4

TRUE

Question 5

A force that is pushing or pulling something is…

Answer 5

a driving force

Question 6

Elastic limit is…

Answer 6

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

Question 7

Electrostatic force is the force acting between two charged objects. True/False

Answer 7

TRUE

Question 8

Another word for equilibrium?

Answer 8

Balanced

Question 9

What is the name of the amount by which an object gets longer when a force is applied?

Answer 9

extension

Question 10

Field is….

Answer 10

a region where something feels a force.

Question 11

The force that resists movement because of contact between surfaces is known as…

Answer 11

friction

Question 12

Gravity is a contact force that acts between two masses. True/False

Answer 12

FALSE - Gravity is a NON-contact force that acts between two masses!

Question 13

Hooke’s law is the law that says if you double the force on an object…

Answer 13

the extension will double

Question 14

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

Answer 14

interaction pair

Question 15

A kilogram is..

Answer 15

a unit of mass (kg)

Question 16

Lubrication

Answer 16

a substance that reduces friction between surfaces when they rub together

Question 17

Magnetic force is the force between two magnets, or a magnet and a magnetic material. True/False

Answer 17

TRUE

Question 18

The amount of matter (stuff) that a thing is made up of is known as…

Answer 18

mass

Question 19

The unit of force, symbol N is…

Answer 19

newton

Question 20

Newton Meter

Answer 20

A piece of equipment used to measure weight in newtons.

Question 21

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

Answer 21

non-contact force

Question 22

Pull

Answer 22

a type of force

Question 23

Push

Answer 23

a type of force

Question 24

The support force provided by a solid surface like a floor is…

Answer 24

reaction force

Question 25

Resistive Forces

Answer 25

Any forces that act to slow down a moving object.

Question 26

Streamlined

Answer 26

Shaped to reduce resistance to motion from air or water

Question 27

Tension is a stretching force. True/False

Answer 27

TRUE

Question 28

Unbalanced

Answer 28

Opposing forces on an object that are unequal.

Question 29

Water Resistance

Answer 29

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

Question 30

The force of the Earth on an object due to its mass is…

Answer 30

weight

Question 31

Balanced

Answer 31

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

Question 32

Drag

Answer 32

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

Question 33

Independent Variable

Answer 33

“What We Change”

Question 34

Dependent Variable

Answer 34

“What We Measure”

Question 35

Controlled Variables

Answer 35

“What We Keep The Same”

Question 36

Formula for Density

Answer 36

Mass/Volume

Question 37

What is the unit of density?

Answer 37

g/cm3 (grams per cm cubed)

Question 38

Formula for Speed

Answer 38

Total Distance/Total Time

Question 39

Unit of Speed?

Answer 39

m/s (metres per second) OR km/h (kilometres per hour) OR km/s (kilometres per second) OR mph (miles per hour)

Question 40

Formula for Weight

Answer 40

mass (kg( * gravitational field strength