The S.I unit for sound energy is
- A. Hz
- B. cd
- C. dB
- D. J
2. The general definition of elastic modulus is
- A. \(\frac{stress}{strain}\)
- B. \(\frac{strain}{stress}\)
- C. \(stress \times strain\)
- D.\(\sqrt{\frac{stress}{strain}}\)
3. 
The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?
- A. PQ
- B. QR
- C. RS
- D. QS
4. The property of a body to remain at rest or to continue in uniform motion in a straight line is called
- A. momentum
- B. Inertia
- C. impulse
- D. Energy
5. During a training session, two footballers pass a ball repeatedly between each other. The ‘to and fro’ motion of the ball is not simple harmonic because the
I. Acceleration of the ball is not directed towards a fixed point
II. Restoring force is not directed towards the centre
III. Acceleration of the ball is not directly proportional to the displacement from a fixed point
Which of the statements above are correct?
- A. I and III only
- B. I and II only
- C. II and III only
- D. I, II and III
6. A dam is able to hold a large quantity of water because its wall is
- A. thickest at the top
- B. thickest at the middle
- C. thickest at the bottom
- D. of the same thickness throughout
7.
A body of mass m moving around a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is
- A. Fv
- B. zero
- C. Fmr
- D. Fr / m
8.
A block is acted upon by TWO horizontal forces as illustrated in the diagram above. The block accelerates at 1.5ms−². Calculate the mass of the block.
- A. 6kg
- B. 9kg
- C. 10kg
- D. 15kg
9. Which of the following quantities are dimensionally independent?
I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index
- A. I and II
- B. II, III and IV
- C. I, II, III and IV
- D. I, III and IV
10. A body is projected with an initial velocity u at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?
- A. The vertical distance covered
- B. Acceleration due to gravity
- C. The horizontal distance covered
- D. The acceleration of the body
