Physics Annual Examinations For Secondary Schools Form 5 - Directorate For Quality And Standards In Education, 2013 Page 5
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126.
Ralph, of weight 700 N, jogs every morning wearing running
2
shoes. The area of each foot is 0.25 m
.
running shoes
a.
Calculate the:
i.
total area of contact with the ground when Ralph stands on both feet,
___________________________________________________________________________
(2)
ii.
pressure exerted by Ralph while standing on both feet.
___________________________________________________________________________
(2)
b.
How does the pressure exerted on the ground change when Ralph:
i.
stands on one foot? Explain.
___________________________________________________________________________
(2)
ii.
stands on two feet holding a 200 N weight in his hand? Explain.
___________________________________________________________________________
(2)
c.
Explain why football shoes studs provide for a better grip with the ground.
______________________________________________________________
(2)
7.
A slinky spring fixed at one end is held by Elise at the other end.
Wave B
Wave A
a.
Draw in the space above two possible types of waves that Elise can produce with the slinky
spring.
(2)
b.
Draw arrows to show how she moves her hands to produce each type of wave.
(2)
c.
Name each type of wave.
Wave A - ______________________________ Wave B - ____________________________
(2)
d.
Complete the follow:
i.
Sound waves are __________________ ii.
Water waves are __________________
(2)
e.
Sound waves travel with a speed of 330 m/s and have a wavelength of 2 m. Calculate the
frequency of these waves.
___________________________________________________________________________
(2)
Physics – Secondary Schools – Track 3 - Form 5 – 2013
Page 5 of 12
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