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2041

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

View Answer & Discuss (2) WAEC 1991

2042

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

View Answer & Discuss (1) WAEC 1991

2043

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

View Answer & Discuss WAEC 1991

2044

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

View Answer & Discuss WAEC 1991

2045

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

View Answer & Discuss (2) WAEC 1991

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