Question 4501:

• NECO 2003

A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.

A. 125 kgms^-1
B. 75 kgms^-1
C. 25 kgms^-1
D. 20 kgms^-1
E. 5 kgms^-1

Question 4502:

• NECO 2003

A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g=10ms^-2)

A. 25ms^-1
B. 40 ms^-1
C. 55 ms^-1
D. 65ms^-1
E. 80 ms^-1

Question 4503:

• NECO 2003

The S.l unit of magnetic flux density is ___________

A. Farad
B. Henry
C. Kgm^-3
D. Tesla
E. Weber

Question 4504:

• NECO 2003

A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?

A. The length of the entrapped air in the horizontal position is less than that in the vertical position
B. The length of the entrapped air in the vertical position is less than that in the horizontal position
C. The length of the mercury column becomes shorter in the horizontal position than in the vertical position
D. The length of the mercury column becomes shorter in the vertical position than in the horizontal position
E. The pressure of the entrapped air is atmospheric in both cases.

Question 4505:

• NECO 2003

Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?

A. Oscillatory
B. Random
C. Rotational
D. Translational
E. Vibratory