NSW Physics Module 5 etc

The Data Sheet

100

Speed of Sound in Air

340 m/s

200

Mass of Earth

6 x10²⁴ kg

300

Specific Heat Capacity of water

4.18 x10³ J/kg/K

400

Speed of Light

3 x 10⁸ m/s

500

Density of Water

1.00 x 10³ kg/m³

Projectile motion

100

Only force acting on a projectile

Gravity

200

We ignore this in all our calculations

Drag/Friction/Air Resistance

300

At max height, all velocity is in the ? direction

horizontal

400

These two components are considered independent

Horizontal and Vertical

500

Most projectiles follow this shape

Parabola

Circular motion

100

 v = (2pir)/T 

linear velocity

200

omega  omega 

angular velocity

300

tau = 

tau = Fr(sin theta)

400

F = (mv^2)/r

Centripetal Force

500

All these equations assume

that the motion is Uniform Circular motion and that the linear velocity is constant.

Motion in Gravitational fields

100

This force provides the centripetal acceleration

Gravity

200

Kepler's Third Law

(r^3)/(T^2) = (GM)/(4pi^2)

300

For any central massive body, this value is constant

(GM)/(4pi^2)

400

v^2 = grtantheta

limiting speed of motion on a banked track, where no sideways friction is accounted for

500

v_0 = sqrt((rF_0)/m)

maximum speed a vehicle can travel around a flat curve

Random

100

How many radians is 78°?

1.36 radians

200

finding the value of acceleration due to gravity

g = (GM)/(r^2)

300

What is orbital velocity independent of?

the mass of the orbiting object

v = sqrt(GM/r)

400

When projectile motion is symmetrical, we can find range using:

s_x = (v^2 sin 2 theta)/g

500

GPE

U = (-GMm)/r

Grav fields 2

100

(mv^2)/2

Kinetic energy

200

The two types of energy of an orbiting mass

Kinetic and Potential

300

GPE becomes more _________ as an object moves towards the central mass

negative

400

Which 2 equations give us this one?

K = (GMm)/(2r)

v^2 = (GM)/r

K = (mv^2)/2

500

Total energy of an orbiting object

- (GMm)/(2r)