How and why things move

 

Revision Questions (1)

 

 

  1. Write down the formula for average speed

 

 

 

 

  1. Calculate the average speed of the following animals. Show all your working and give units.

 

 

(a) A cheetah runs 300 m in 12.5 seconds

 

 

 

 

(b)      A Tyrannosaurus moves a distance of 110 m in  14 s

 

 

 

 

 

 

(c)  A garden snail moves a distance of 3 m in  105 s

 

 

 

 

(d) A Peregrine falcon swoops down and covers a distance of 44.7 m in  0.5 s

 

 

 

 

 

 

 

 

 

 

 

 

 

3.  The journey of a car is shown below

 

(a)     What does the size of a gradient of this graph indicate?


(b)     What does a positive gradient of this graph indicate? 


(c)     What does a negative gradient of this graph indicate?

 

(d)     Describe what is happening in each of the regions A, B, C, D and E

A ____________________________________________

B ____________________________________________

C ____________________________________________

D ____________________________________________

E ____________________________________________

 

 

 

(e)   Calculate the average speed of the car in region B

 

 

(f)  Calculate the average speed of the car in region D

 

 

 

4.   The diagram below shows one model for the expansion of the universe in the Big Bang theory. The graph shows how the distance between two galaxies changes with time

Use this graph to compare the speeds of expansion at points A, B and C.
Explain how you arrived at your answer.

 

 

 

 

 

 






5.      



                             A digital tachograph




A digital tachograph is an electronic system for recording driving and rest times for drivers of commercial vehicles. It records vehicle speed, and the distance traveled. Information is stored in a memory inside the unit and on smart cards. Each driver has their own smart card.

 

Explain how the fitting of tachographs to commercial vehicles can help to improve safety on the roads.