List the known units of distancedistancedistance and time in the SI system.

Describe how we determine the average speed.

How can we graphically describe the motion of bodies?

Specify what the letters in the formula mean.

Which units are valid units of distancedistancedistance? Choose the correct answers.

a) day
b) light year
c) sea mile
d) metermetermeter
e) hectare
f) yard

Which units are valid speed units? Choose the correct answers.

a) $m·s^{-1}$
b) $1\frac{cm}{s}$
c) miles
d) knot
e) horsepower
f) mach

Two cars are moving at speeds of $v_1=30\frac{m}{s}$ and $v_2=2,4\frac{km}{min}$ in the same direction, respectively. The second is behind the first one. Will the second car catch up with the first one?

A sprinter ran 100 m in 10 seconds. What was the speed of the sprinter? Give the result in $\frac{km}{h}$.

A ship is moving at a speed of 7 knots (kn). At what speed the ship is moving in $\frac{km}{h}$?
Assume $1knot=1kn=\frac{1nauticalmile}{h},1nauticalmile=1852m$.

Convert the speed to the appropriate units.

a) $54\frac{km}{h}=...\frac{m}{s}$

b) $30\frac{m}{s}=...\frac{km}{h}$

c) $20\frac{cm}{min}=...\frac{m}{s}$

d) $60\frac{m}{s}=...\frac{km}{min}$

Write in English which vehicle was moving faster. The delivery truck travelled 2000 m in 0,04 h, and the passenger car drove 4 km in 6 min. Calculate the average speed.