Physics 2018 Waec Past Questions and Answers

Question 11 :

• WAEC 2018

A body is projected with an initial velocity u at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?

A. The vertical distance covered
B. Acceleration due to gravity
C. The horizontal distance covered
D. The acceleration of the body

Question 12 :

• WAEC 2018

An object at rest is said to possess

A. Potential energy
B. Kinetic energy
C. Chemical energy
D. Electrical energy

Question 13 :

• WAEC 2018

According to Newton's law of cooling, the heat energy lost per unit area of a body depends on the
I. Surface area
II. Nature of the surface
III. Temperature of the surface
IV. Excess temperature over the surroundings

A. I and II only
B. II and IV only
C. I,II and III
D. I, II and IV

Question 14 :

• WAEC 2018

The graph of density against temperature for water is correctly illustrated by

A. I
B. II
C. III
D. IV

Question 15 :

• WAEC 2018

A football is kicked at an angle of 45° to the horizontal over a defense line up with a velocity of 15\(ms^{-1}\). Calculate the magnitudeof horizontal velocity of the ball at its highest point [Neglect friction, g = 10\(ms^{-2}\)].

A. 0.0\(ms^{-1}\)
B. 5.6\(ms^{-1}\)
C. 10.6\(ms^{-1}\)
D. 15.0\(ms^{-1}\)