Physics 2000 Jamb Past Questions and Answers

Question 6 :

• JAMB 2000

If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is

A. Doubled
B. Reduced to a quarter
C. Reduced by half
D. Constant

Question 7 :

• JAMB 2000

A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is

A. 4.0 x 10²N
B. 2.0 x 10³N
C. 4.0 x 10³N
D. 4.0 x 10⁴N

Question 8 :

• JAMB 2000

A stream is flowing at 0.75ms\(^{-1}\) and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30°. Calculate the velocity of the boat.

A. 1.50ms^-1
B. 1.00ms^-1
C. 0.86ms^-1
D. 0.65ms^-1

Question 9 :

• JAMB 2000

A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms\(^{-1}\) in 8s [g = 10ms\(^{-2}\)]

A. 5N
B. 50N
C. 95N
D. 105N

Question 10 :

• JAMB 2000

I. The frictional force is independent of the area of the surfaces in conduct
II. The frictional force depends on the nature of the surfaces in contact
III. The frictional force depends on the speed of sliding
IV. The frictional force is directly proportional to the normal reaction.
Which combination of the above is true of sliding friction?

A. I, III and IV
B. I, II and IV
C. I, II and III
D. II, III and IV