Waec Physics 1991 Past Questions and Answers

Question 6:

• WAEC 1991

the diagram above shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?

A. 5
B. 4
C. 3
D. 2
E. 1

Question 7:

• WAEC 1991

An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms^-2)

A. 3.0s
B. 4.5s
C. 6.0s
D. 7.5s
E. 9.0s

Question 8:

• WAEC 1991

power is defined as the

A. Capacity to exert a force
B. Product of force and time
C. Product of force and distance
D. Ability to do work
E. Energy expended per unit time

Question 9:

• WAEC 1991

The product PV where P is pressure and V is volume has the same unit as

A. Power
B. Work
C. Acceleration
D. Impulse
E. Force

Question 10:

• WAEC 1991

The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W

A. 300N
B. 200N
C. 140N
D. 120N
E. 20N