waecE-LEARNING
Physics Paper 2, May/June. 2014  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main


General Comments
Weakness/Remedies
Strength

























Question 2

A tennis ball projected at an angle   attains a range R = 78 m.  If the velocity imparted to the ball
   by the racket is 30ms-1 , calculate .
                  [g = 10ms-2]


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Observation

 

This was another popular question among the candidates.  Most of them were able to state the correct formula and substituted correctly.  However, few had difficulty in handling sin =   to obtain the value of .  Some candidates manipulated sin 2  =  0.866 and got sin  =  0.433 which was wrong.  Some could not determine the arc sine (sin-1) of the number to arrive at the correct answer.  Few candidates failed to write unit while some gave wrong unit.

The expected answer is

 

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