WAEC Past Questions and Answers - Page 4133

20,661.

A body weighing 10 N in air is partially immersed in water. It displaces water of mass 0.3 kg. What is the upthrust on the body? (g = 10 ms^-2)

A.

13.0 N

B.

7.0 N

C.

3.3N

D.

3.0N

E.

0.3N

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

20,662.

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N calculate its mechanical advantage?

A.

0.7

B.

0.9

C.

1.5

D.

2.5

E.

10.0

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

20,663.

A car travelling at a uniform speed of 120km h-1 passes two stations in 4 minutes. Calculate the distance between the two stations.

A.

8km

B.

15km

C.

22km

D.

30km

E.

60km

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

20,664.

Which of the following will reduce the frequency of oscillation of a simple pendulum?

A.

Increasing the mass of the bob

B.

Decreasing the mass of the bob

C.

Increasing the length of the string

D.

Decreasing the length of the string

E.

Decreasing the amplitude of oscillation

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

20,665.

At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain a maximum horizontal range for the bullets?

A.

0.0^o

B.

22.5^o

C.

30.0^o

D.

45.0^o

E.

90.0^o

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

WAEC Subjects

English Language

Agricultural Science

Physical Education

Further Mathematics

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Office Practice

Civic Education

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