Physics Past Questions and Answers

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<br/>I. Acceleration of the ball is not directed towards a fixed point<br/>II. Restoring force is not directed towards the centre<br/>III. Acceleration of the ball is not directly proportional to the displacement from a fixed point<br/>Which of the statements above are correct?

A dam is able to hold a large quantity of water because its wall is

A body of mass <b>m </b>moving around a circle of radius <b>r </b>with a uniform speed <b>v </b>experiences a centripetal force <b>F. </b>The work done by the centripetal force on it is

A block is acted upon by TWO horizontal forces as illustrated in the diagram above. The block accelerates at 1.5\(ms^{-2}\). Calculate the mass of the block.

Which of the following quantities are dimensionally independent?<br/>I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index