Short Answer Questions for 2015 Physics Exam paper. The Answers are provided at the end of the post.  Attempt to answer the questions first by commenting below. Then compare your answers with ours.

QUESTION 31
A ball is projected into the air with an initial velocity of 20m/s at angle of 60° above the horizontal. The ball lands at a distance of X meters from the launching point.
a). What is the horizontal component of the velocity of the ball?          (2 marks)
b). How long was the ball in the air?                                                 (3 marks)
c). What is the horizontal distance X travelled?                                   (2 marks)​

QUESTION 16
The transfer of heat is normally from an object or area at high temperature to an object or area at lower temperature. This phenomena ceases when both objects or areas are at the same temperature. This state is a state of
A. phase change.
B. thermal vaporization.
C. thermal fusion.
D. thermal equilibrium.
E. thermal expansion .

QUESTION 17
The mass number of an element is the number of
A. electrons.
B. protons.
C. neutrons.
D. protons and electrons.
E. protons and neutrons.

QUESTION 18
Which of the following types of radiation is more massive?
A. gamma
B. positron
C. alpha
D. negatron E. beta 

These questions are taken from the Grade Physics National Examination 2015.  The questions are posted in parts.  See the other posts to see the complete paper . The Answers are provided at the end of this post. Make sure to attempt the Question by commenting below before you view the Answers by hitting the (+) on the read shaded area. 

QUESTION 1
Which instrument would be appropriate for measuring the thickness of an A4 sheet of paper?
A.    A Vernier Calliper
B.    A meter ruler
C.    A micrometer
D.    A top pan balance
E.    A 30 cm ruler

QUESTION 2
Which of the following combination of basic SI units is a joule (J)?
A.   kg ms-2 
B.   kg m-1 s-2 
C.   kg m-2 s-2
D.   kg m-1 s-1
E.   kg m-1s-2

QUESTION 3
A ball is thrown up in air and returns to the thrower. During its motion, the acceleration of the ball
A.    remains constant and directed upwards for all times.
B.    remains constant and directed downwards for all times.
C.    changes in magnitude and directed downwards for all times.
D.    changes in magnitude and directed upwards for all times.
E.    remains constant but directed upwards when the ball is moving up and is directed downwards when the ball is moving downwards.

QUESTION 4
The area under the velocity-time graph for an object moving with constant acceleration represents
A.   momentum.
B.   initial velocity.
C.   acceleration.
D.   final velocity.
E.   displacement.

QUESTION 5
A projectile is launched upwards at an angle less than 90°
, relative to the horizontal. During its motion, the
velocity in the horizontal direction
A.    changes.
B.    remains constant always.
C.     is zero at maximum height of the projectile.
D.    is always positive on the way up only.
E.     is always negative on the way down only.