Jamb Physics 1990 Past Questions and Answers

Question 6:

• JAMB 1990

To keep a vehicle moving at a constant speed v, requires power P, from the engine. The force provided by the engine is

A. $\frac{p}{v}$
B. $\frac{1}{2}$ v
C. Pv
D. $\frac{p}{v^2}$ v

Question 7:

• JAMB 1990

A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is

A. Mh
B. Mgh
C. $\frac{mgh}{50}$
D. O

Question 8:

• JAMB 1990

A body of mass 10kg rests on a rough inclined plane whose angle of tilt $\theta$ is variable. $\theta$ is gradually increased until the body starts to slide down the plane at 30^o. The coefficient of limiting friction between the body and the plane

A. 0.30
B. 0.50
C. 0.58
D. 0.87

Question 9:

• JAMB 1990

An inclined plane which makes an angle of 30^o with the horizontal has a velocity ratio of

A. 2
B. 1
C. 0.866
D. 0.50

Question 10:

• JAMB 1990

What is the length of liquid column in a barometer tube that would support an atmospheric pressure of 102000Nm^-2 if the density of the liquid is 2600kgm^-3? [g = 10ms^-2]

A. 0.75m
B. 0.76m
C. 3.92m
D. 39.23m