Forces

Question 1

Independent variable

Answer 1

The variable that changes

Question 2

Dependent variable

Answer 2

The variable that is measured

Question 3

Control variables

Answer 3

The variable that are kept the same

Question 4

A force

Answer 4

A push or a pull

Question 5

Newton

Answer 5

The unit we use for forces

Question 6

Applied force

Answer 6

Pushing/pulling force

Question 7

Gravitational force

Answer 7

The force pulling you down

Question 8

Reaction force

Answer 8

The force pushing against weight and keep ing you balanced

Question 9

Weight

Answer 9

The force pulling against reaction and also keeping you level

Question 10

Hookes law

Answer 10

If the extension of the spring and the force on a graph make a straight line.

Question 11

Elastic limit

Answer 11

When you stretch a band to much and it can’t stretch any more it has reached it’s elastic limit

Question 12

Compress

Answer 12

When you squash something together. An example is compressed gas.

Question 13

Friction

Answer 13

If an object is rubbed against another object it creates friction. Friction can also heat up things.

Question 14

Deform

Answer 14

When a shape or something falls apart or changes from its original shape. A force can deform objects.

Question 15

Streamlined

Answer 15

Something is streamlined if it goes straight. E.G i swim fast because i am streamlined

Question 16

Newton meter

Answer 16

An object that measures the force of another object by putting it on a hook and letting it drop. Then you measure how far down it is with a ruler

Question 17

Extension

Answer 17

How far something goes/stretches. E.g the extension of a spring is how far it stretches

Question 18

Balanced forces

Answer 18

When two forces that pull against each other have the same amount of power. E.g in tug of war if the two teams pull with the same amount of force they are balanced.

Question 19

Unbalanced forces

Answer 19

When two forces that are pulling against each other are not equal e.g if one tug of war team is stronger than the other they are pulling with different amounts of force. They are unbalanced

Question 20

Contact forces

Answer 20

When forces (like friction) only act when you are touching them

Question 21

Non-contact forces

Answer 21

The force acting without you having to touch it

Question 22

Interaction pairs

Answer 22

Forces always come in pairs to work together or against each other e.g reaction force and weight.

Question 23

Force diagram

Answer 23

A diagram to show how the force is moving e.g a man being blown away you would draw a bigger arrow going up and a smaller one going down to show which force is stronger.

Question 24

Resultant force

Answer 24

The total force on an object

Question 25

Air resistance

Answer 25

It acts in the air and slows down objects that are moving against it. E.g If you are running the air molecules are slowing you down as you have to push past them.

Question 26

Tension

Answer 26

When something goes to its elastic limit and then pulls the object/person back up e.g bungee jumper.

Question 27

Water resistance

Answer 27

It acts in water and slows down objects that are moving against it e.g a swimmer

Question 28

3 effects of force

Answer 28

Forces can make objects: change shape, start moving or stop moving

Question 29

Upthrust

Answer 29

Upthrust is a force that liquid or gas exerts on an object or body E.g someone floating in water

Question 30

Thrust

Answer 30

Thrust is a force that pushes a mass in a certain direction e.g a plane