Units
Definitions 1
Definitions 2
Calculations 1
100

Unit of Mass

Kg

100

Definition of Mass

The ammount of matter in an object, or a measure of its inertia

100

Definition of Equilibrium

A net force of zero on an object

100

How far will a car travel in 2 seconds if its average speed is 5m/s?

10 M

200

Units of Weight

N

200

Definition of weight

ammount of gravitational force on an object, varies with the objects location


200

Definition of Normal Force

A support force that opposes gravity

200

What is the hang time of a kangaroo that jumps a vertical distance of 5m while moving forward 5m?

1 sec

300

Units of Velocity

m/s

300

Definition of a Rate

How fast a given quantity changes with respect to time

300

Definition of Friction

A force that opposes motion

300

We drive for 1 hour at 20 km/h. Then we drive for 1 hour at 40km/h. What is our average speed?

30 kph

400

Units of acceleration

m/s2

400

Definition of Inertia

An object’s resistance to change

400

Definition of Tension

A stretching force

400

Calculate the instantaneous speed of an object that falls freely for 5 seconds

50 m/s

500

Units of Force

N

500

Definition of a Satellite

A projectile that continually “falls” around the earth

500

Definition of Free Fall

A fall that is free of air resistance and all other forces other than gravity

500

You kick a soccer ball at an angle of 27°. How far below its initial straight-line path will the ball fall in its first 1 second of flight?

5m