Forces

Question 1

What is a force?

Answer 1

A pull, push or twist

Question 2

What do forces do?

Answer 2

They can change the shape, direction or speed of an object

Question 3

What apparatus measures force?

Answer 3

Newton meter

Question 4

What is the unit and to unit symbol for force

Answer 4

Newtons (N)

Question 5

How do we represent different forces on a diagram?

Answer 5

Arrows.

Question 6

What does the arrow size on a forced diagram represent?

Answer 6

The size of the force

Question 7

What is the difference between weight and mass?

Answer 7

Mass is the amount of stuff something is made of and weight is dependent on the gravitational field strength

Question 8

What are 2 objects interacting with each other called?

Answer 8

Am interaction pair

Question 9

How do the forces in an interaction pair compare?

Answer 9

The same size but in the opposite directions

Question 10

Give an example of an interaction pair

Answer 10

Pushing down on a table, throwing a ball, gravitational attraction between 2 objects with mass

Question 11

What is deformation

Answer 11

Changing the shape of an object

Question 12

What is compression

Answer 12

Decreasing the length of an object

Question 13

What is extension

Answer 13

Increasing the length of an object

Question 14

What is a reaction force

Answer 14

A contact force from a solid surface

Question 15

What is hookes law

Answer 15

As the force on a spring increases, so does the extension

Question 16

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

Answer 16

The elastic limit

Question 17

Describe the shape of the graph for hookes law.

Answer 17

Straight line growth that goes through (0,0)

Question 18

What is the force that resists movement because of the contact between surfaces called?

Answer 18

Friction

Question 19

What causes friction

Answer 19

Contacts between surfaces

Question 20

Give a use of friction

Answer 20

Brakes on a car, walking

Question 21

Give an example of where friction causes problems.

Answer 21

Slipping, (if there’s not enough) slowing objects down

Question 22

How can friction be reduced

Answer 22

Lubrication

Question 23

What is a fluid

Answer 23

A liquid or gas

Question 24

What is the resistance force caused by the motion through a fluid called?

Answer 24

Drag force

Question 25

Give an example of drag force

Answer 25

Air resistance or water resistance

Question 26

How would particles from a fluid colliding, with a moving object, providing a resistance force affected its speed?

Answer 26

It would slow down

Question 27

Hwo can drag forces be reduced?

Answer 27

Making an object more streamlined

Question 28

What is a contact force

Answer 28

A force that acts between objects that are touching

Question 29

What is a non-contact force?

Answer 29

A force that acts between objects that are touching

Question 30

Give an example of a contact force

Answer 30

Friction, air resistance

Question 31

Give an example of a non- contact force

Answer 31

Weight, magnetic force and electrostatic force

Question 32

What is a special region where something experiences are forced called?

Answer 32

A field

Question 33

What is the equation to calculate weight

Answer 33

Weight = mass x gravitational field strength.

Question 34

Why is weight different on different planets?

Answer 34

Weight is dependent on the gravitational filled strength of the planet.

Question 35

What is a balanced force

Answer 35

A force acting on an object in one direction that is the same size as a force acting in the opposite direction.

Question 36

Describes what happens If forces are balanced

Answer 36

An object will remain stationary ir will move at a constant speed

Question 37

What is the overall force when several forces combine called?

Answer 37

Resultant force

Question 38

Describe what happens if forces are unbalanced

Answer 38

The objects speed changes

Question 39

What is a resistive force

Answer 39

Any force that acts to slow down a moving object

Question 40

What is the size of the resultant force if the forces are balanced?

Answer 40

ON