Jamb Physics 1987 Past Questions and Answers

Question 6:

• JAMB 1987

A constant force of 40N acting on a body initially at rest gives an acceleration of 0.1ms^-2 for 4s. Calculate the work done by the force

A. 8J
B. 10J
C. 32J
D. 160J

Question 7:

• JAMB 1987

A body rolls down a slope from a height of 100m. its velocity at the foot of the slope is 20ms^-1. What percentage of its initial potential energy is converted into kinetic energy? [g = 10ms^-1]

A. 40%
B. 35%
C. 20%
D. 15%

Question 8:

• JAMB 1987

The coefficient of static friction between a 40kg crate and concrete surface is 0.25. Find the magnitude of the minimum force needed to keep the crate stationary on the concrete base inclined at 45o to the horizontal. [G = 10ms-1]

A. 400N
B. 300N
C. 283N
D. 212N

Question 9:

• JAMB 1987

If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to

A. Friction
B. Viscosity
C. Surface tension
D. Evaporation

Question 10:

• JAMB 1987

The mechanical advantage(MA) of an inclined plane depends on

A. Its length
B. Its height
C. The product of its length and height
D. The ratio of its length to its height