Geometry and calculating speed

Question 1

What is a locus?

Answer 1

Is a collection of points which share a property

(eg the circumference of a circle is the locus of all points in 2D that are the same distance from a particular point - the centre)

Question 2

How do you calculate speed?

Answer 2

Distance devided by time

Question 3

How to find the average speed?

Answer 3

Find the all distances by speed x time
Add the distance to find the total distance
Add the time to find the total time
Divide the distance by speed

Question 4

How do you find distance?

Answer 4

Speed x time

Question 5

How do you find time?

Answer 5

Distance divided by speed

Question 6

How far has a bus travelled if it goes at a speed of 54km/h for a time of 40 minutes?

Answer 6

D = 54 x 40/60

= 36km/h

Question 7

Which is faster, a leopard running at 64 km/h or a bird flying at 15 m/s?

Answer 7

64 km/h = 64 km / 1 h
= 64000/60 x 60
= 17.7 m/s

Question 8

The distance the Earth travels around the sun in one year is about 940 million km. Assuming one year us 360 days, find the speed of the Earth in km/h

Answer 8

Speed = d/t
= 940000000 km / 365 x 24
= 107306