### Chapter 5 - Circular Motion - 4

 1. The angular acceleration of a body experiencing torque is directed:-a) away from the centre of the circle. b) along the tangent to the circle.c) towards the centre of the circle.d) along the axis of rotation.
 2. The acceleration of a freely falling body is:-a) Positive 9.8 m / s2 b) Zero m / s2c) 19.6 m /s2d) Negative 9.8 m / s2
 3. Torque is produced by a force which is directed:-a) along the tangent to the circle b) towards the centrec) None of the above.d) along the axis of rotation.
 4. Angular acceleration is produced when the body is moving with:-a) Variable velocity in a straight line. b) Accelerated circular motion.c) Uniform circular motion.d) Constant speed in a circle.
 5. An elevator is moving upward with an acceleration "a" the apparent weight of a body of mass m in the elevator will be:-a) equal to m (g-a) b) equal to m (g+a)c) equal to mad) equal to mg
 6. The orbital velocity of a satellite orbiting around the earth is directly proportional to:-a) the radius of the orbit "r". b) square root of the 1 / "r"c) square root of the radius r.d) the 1/ "r" of the orbit
 7. A body moving counter clock-wise when slows down its angular acceleration will be:-a) directed anticlock-wise. b) directed clock-wise.c) directed away from us.d) directed towards us.
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