Waec Physics 2015 Past Questions and Answers

Question 51:

• WAEC 2015

Two angles of a pentagon are in the ratio 2:3. The others are 60^o each. Calculate the smaller of the two angles

A. 72^o
B. 100^o
C. 120^o
D. 144^o

Question 52:

• WAEC 2015

(a) What is a projectile?
(b) Give the reason why the horizontal component of the velocity of a projectile remains the same at every point of its flight.

Question 53:

• WAEC 2015

A body is projected at an angle of 30° to the horizontal with a velocity of 150 ms\(^{-1.}\). Calculate the time it takes to reach the greatest height [Take g = 10 ms\(^2\) and neglect air resistance]

Question 54:

• WAEC 2015

A wire of length 2.00 m and radius 1.0 mm is stretched by 25.0 mm on application of a force of 103 N. Calculate the Young's modulus for the wire.

Question 55:

• WAEC 2015

State three ways of increasing the rate of cooling of a cup of hot tea.