Principles of moments - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1994

The fig above shows a uniform wood of weight 200Nand length 50m. It is pivoted at one end and suspended by a cord at the other end at an angle of 30 degrees to the wood. calculate the tension in the cord if the wood is horizontal

A. 10N
B. 20N
C. 100N
D. 200N

Question 12:

• JAMB 1995

A uniform rod PQ of length 1m and mass 2kg is pivoted at the end p. If load of 14N is placed at the center of the rod, find the force that should be applied vertically upwards at Q to maintain the rod at equilibrium horizontally [g = 10ms^-2]

A. 68N
B. 28N
C. 17N
D. 7N

Question 13:

• JAMB 1998

A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the 30cm-mark. where will a force of 2N be placed from the pivot to balance the meter rule?

A. 95cm
B. 25cm
C. 20cm
D. 5cm

Question 14:

• JAMB 2003

A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends.

If the fulcrum is at the center of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is

A. 15N
B. 20N
C. 30N
D. 60N

Question 15:

• JAMB 2007

The unit of moment of a couple can be expressed in?

A. N m^-1
B. N m^-2
C. N m
D. N m²