Waec Physics 1993 Past Questions and Answers

Question 6:

• WAEC 1993

A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V lf linear momentum is conserved, which of the following expressions correctly represents V?

A. M₁ U/M₁ + M₂
B. M₂ U/M₁ + M₂
C. M₁ + M₂/M₁ U
D. M₁ - M₂/M₁ U
E. M₁ U/M₁ - M₂

Question 7:

• WAEC 1993

A body of mass m = 0.5 kg is suspended by a string and pulled by a horizontal force of 1g N as shown in the 12N diagram: Calculate the tension T in the String if the body is in equilibrium. [Take g as 10ms^-1]

A. 7.0
B. 10.9
C. 12.5
D. 13.0
E. 17.0

Question 8:

• WAEC 1993

A particle starts from rest and moves with a constant acceleration of 0.5 ms^-2? Calculate the time taken by the particle to cover a distance of 25m.

A. 25s
B. 7.1s
C. 10.0s
D. 50.0s
E. 100.0s.

Question 9:

• WAEC 1993

A block of material of volume 2 X 1O^-5m³ and density 2.5 x 10^-3 kgm^-3 is suspended from a spring balance with half volume of the block immersed in water. What is the reading of the spring balance? (Density of water =1.0x10³ kg m^-3 g = 10 ms^-2).

A. 0.10N
B. 0.25N
C. 0.30N
D. 0.40N
E. 0.50N

Question 10:

• WAEC 1993

An object is projected with a velocity of 100 ms^-1 from the ground level at an angle 0 to the vertical. If the total time of flight of the projectile is 10 s, calculate θ. (g = 10 ms^-2).

A. 0^o
B. 30^o
C. 45^o
D. 60^o
E. 90^o