Chapter 9 9.1 and 9.2 questions 11 and 13
How many centimeters are in a kilometer
100,000
The trunk of a certain tree is 50 centimeters thick. Each year it gets thicker by 1 centimeter. How thick will the tree trunk being 50 years
100cm
An airplane that moves 50 meters in one second has a speed of
180,000m/h
A car travels at 25m/s speeds up to 40m/s over a period of 15 seconds. The average acceleration of the car is
1m/s squared
An airplane flies 80 kilometers in 10 minutes and then flies 100 kilometers in 20 minutes the average speed of airplane is
360km/h
The rider finishes 120 kilometer bicycle trip in 3 hours. The average speed of their ride is
40km/h
A runner start say five kilometer race at 10:15 a.m. and finishes at 10:35 a.m. given this information you can calculate the runners
average speed
It can be important to know the velocity of an object not just its speed because velocity also tells
direction
The velocity of an object give both speed and
direction
Speed measurements are given in units of
distance/time
Measurements of acceleration are given in units of
distance/time squared
An object is in motion if it is moving relative to a
reference point
