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Tara and Lucy's Flashcards
IGCSE Revision - Forces and Motion
27
Physics
10th Grade
12/23/2015

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Cards

Term

 

 

Forces and Motion

Definition
Term

 

 

What is the equation for speed?

Definition

 

 

 

Speed = distance/ time

(distance divided by time)

Term

 

 

What are some of the many different kinds of forces?

Definition

- Push and Pull

- Magnetism

- Air resistence

- Up thrust

- Friction

-Gravity

Term

 

 

What is the definition of a force?

Definition

 

A force is something which acts either in contact or at a distance, and results in a change in shape, speedor direction

Term

 

 

What is gravity on earth?

Definition

 

 

10

Term

 

 

And on the moon?

Definition

 

 

1.6

Term

 

 

Forces can change 3 things, what are they?

Definition

 

-Direction

- Speed

- Shape

Term

 

 

What is the equation for velocity?

Definition

 

 

Its the same as speed! So its speed = distance/time

Term

 

 

What is the equation for acceleration?

Definition

 

 

Accerelation = change in velocity/ time taken

Term

 

If a bag of potatos weighed 5kg, how much would it weigh on earth where gravity is 10N/kg

Definition

 

 

50N/kg

Term

 

 

What is the equation linking force, mass and acceleration?

Definition

 

 

Force = mass x acceleration

Term

 

 

What is the equation linking weight, mass and gravity?

Definition

 

 

Weight = mass x gravity

Term

 

 

What is terminal velocity?

Definition

 

 

Terminal velocity is when both forces acting on the object are balanced.

Term

 

 

What is the equation for stopping  distance?

Definition

 

 

Stopping distance = thinking distance + braking distance

Term

 

 

What are some of the things that affect the thinking distance?

Definition

Drinking

Texting

Drugs

Nightime

Age of driver

Term

 

 

What are some of the things that affect braking distance?

Definition

- Tire type

- Road conditions

- Quality of brakes

- Weather conditions

- Mass of car

Term

 

How long does it take a swimmer in the 200m freestyle if she can swim at 5m/s

Definition

 

 

200 divided by 5 = 40 seconds

Term

 

What is the equation to match Hooke's law?

Definition

 

 

Force is proportional to extension

K = F divided X

Term

 

 

Why does a rubber not apply to Hooke's law?

Definition

 

Because Hooke's law only works with materials where stress is proportional to strain but rubber is not one of those materials

Term

 

 

What is a moment of a force?

Definition

 

 

A moment is the turning effect of a force.

Term

 

 

How is moment calculated?

Definition

 

 

Moment (Nm) = Force (N) x distance from pivot (m)

Term

 

 

What is the equation for working out the orbital radius?

Definition

 

 

2 x pi x orbital speed/Time period

Term

 

 

What is the order of the planets?

Definition

- Mercury

- Venus

- Earth

- Mars

- Jupiter

- Saturn

- Uranus

- Neptune

Term

 

 

What is the difference between the orbits in comits, moons and planets?

Definition

- Comets and planets orbit the sun whilst moons are natural objects that orbit a planet.

- The earth takes 365 days to orbit but only takes 29.5 days for the moon to orbit the earth.

Term

 

 

What are asteroids?

Definition

 

 

Asteroids are minor planets or rocks that orbit the sun

Term

 

 

What is an satellite?

Definition

 

Satellites are objects that orbit a planet and are held in orbit by gravatational forces.

Term

 

 

What is the milky way?

Definition

 

The Milky Way is an enormus amount of stars clustered together into a group called a galaxy. The Milky Way is described as a spiral galaxy.

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