Jamb Physics 1994 Past Questions and Answers

Question 6:

• JAMB 1994

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

A. The energy is costant but the linear momentum varies
B. The linear momentum is conatant but the energy varies
C. Both energy and linear momentum are constant
D. The speed and the linear velocity are both constant

Question 7:

• JAMB 1994

An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground

A. 250J
B. 1000J
C. 10 000J
D. 100 000J

Question 8:

• JAMB 1994

A cone in an unstable equilibrium has its potential energy

A. Decreased
B. Increased
C. Unchanged
D. Oscillating

Question 9:

• JAMB 1994

Calculate the magnitude of the force required to just move a 20kg object along a horizontal surface if the coefficient of friction is 0.2. [g = 10ms^-2]

A. 400.0N
B. 40.0N
C. 4.0N
D. 0.4N

Question 10:

• JAMB 1994

Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm

A. \(\frac{1}{140}\)\(\pi\)
B. 14\(\pi\)
C. 70\(\pi\)
D. 140\(\pi\)