Physics Annual Examination Worksheet '- Educational Assessment Unit, 2014 Page 4

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4. a) Complete:
The principle of ___________________________________________ states that energy can
neither be created nor destroyed but only changed from one form to another.
[1]
ball
ground
Figure 4
b) Figure 4 shows a ball of mass 0.25 kg being kicked vertically upwards with a speed of
5 m/s.
i) Calculate the kinetic energy of the ball just after being kicked.
_______________________________________________________________________
_____________________________________________________________________ [2]
ii) What is the value of the potential energy of the ball at maximum height? (Assume there
are no energy losses)
_____________________________________________________________________ [1]
iii) Calculate the maximum height reached by the ball.
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_____________________________________________________________________ [2]
c) Complete:
After hitting the ground the kinetic energy of the ball is changed to ________________ and
_________________.
[2]
Physics – Form 3 Secondary – Track 3 – 2014
Page 4 of 10

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