Waec Physics 1990 Past Questions and Answers

Question 11:

• WAEC 1990

An object R leaves a platform XY with a horizontal velocity of 7m^-1 and lands at Q. lf it takes the same object 0.3s to fall freely from Y to P, calculate the distance PQ.(Take g = 1Oms²)

A. 7.30m
B. 2.55m
C. 2.10m
D. 1.65m
E. 0.45m.

Question 12:

• WAEC 1990

A simple pendulum makes 50 oscillations in one minute. What is its period of oscillation?

A. 0.02s
B. 0.20s
C. 0.83s
D. 1.20s
E. 50.00s

Question 13:

• WAEC 1990

The body P shown in the diagram above is in equilibrium. If the mass Q of the body is 10kg, calculate the tension T in the string. (Take g = 10ms²)

A. 20/√3N
B. 20N
C. 50N
D. 200√3N
E. 200N

Question 14:

• WAEC 1990

An object weighs 10.0 N in air and 7.0 N in water. What is its weight when immersed in a liquid of relative density 1.5?

A. 4.50N
B. 4.67N
C. 5.50N
D. 6.67N
E. 8.50N

Question 15:

• WAEC 1990

The absolute zero temperature is defined as the temperature at which

A. Thermal motion ceases
B. The temperature of a gas is 273^oC
C. Ice melts
D. The volume of a real gas is maximum
E. The pressure of a real gas is maximum