counting of currency notes with moist fingers is based on the principles of?
- A. diffusion
- B. cohesion
- C. adhesion
- D. viscosity
If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy?
- A. h =(u)2/g
- B. h = (u)2/4g
- C. h = (2u)2/g
- D. h = (u)2/2g
What is the frequency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25 s?
- A. 0.01 Hz
- B. 0.04 Hz
- C. 2.27 Hz
- D. 3.60 Hz
I. All the three forces must be concurrent.
II. The upward force is equal to the downward force.
III. The algebraic sum of the moment about any point must be zero.
which of the above conditions must hold for a body acted upon by a system of three coplanar forces equilibrium?
- A. I and II only
- B. I and III only
- C. II and III only
- D. I, II and III
If a wheel 1.2 m in diameter rotates at one revolution per second, calculate the velocity of the wheel.
- A. 3.6 ms-1
- B. 3.77 ms-1
- C. 4.0 ms-1
- D. 7.5 ms-1
Which of the following is NOT a vector quantity?
- A. altitude
- B. acceleration
- C. displacement
- D. weight
I. Force (N)
II.Torque (Nm)
III. Current (A)
IV. Power (W)
Which of the above are the correct S. I: units of the quantities indicated?
- A. I and II only
- B. I and III only
- C. I, II and III only
- D. I, II, III and IV only