Revision: ADVANCED PHYSICS – Circular Motion Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. Advanced Physics: Circular Motion - Revision Quiz Test your understanding of Advanced Physics: Circular Motion here: 1 / 5 1) When the aircraft Concorde is moving in a horizontal plane at a constant speed of 650 m s–1, its turning circle has a radius of 80 km. What is the ratio of the centripetal force to the weight of the aircraft? 0.53 1.9 52 540 2 / 5 2) The diagram shows a disc of diameter 120 mm that can turn about an axis through its centre. 2) The disc is turned through an angle of 30º in 20 ms. What is the average speed of a point on the edge of the disc during this time? π m s–1 2π m s–1 1.5π m s–1 0.5π m s–1 3 / 5 3) The maximum safe speed of a car rounding an unbanked corner is 20 m s–1 when the road is dry. The maximum frictional force between the road surface and the wheels of the car is halved when the road is wet. What is the maximum safe speed for the car to round the corner when the road is wet? 14 m 10 m 7.1 m 5.0 m 4 / 5 4) A small ball is attached to a light string of length 1.5 m. The ball moves in a horizontal circle such that the string makes a constant angle of 30° with the vertical. What is the speed of the ball? 1.5 m s⁻¹ 2.1 m s⁻¹ 4.2 m s⁻¹ 3.5 m s⁻¹ \(v^2=rg\tan\theta\), where \(r=L\sin\theta\) 5 / 5 5) A stone is attached to a string and moves at constant speed in a horizontal circle on a smooth table. The tension in the string is 12 N. A student claims that the total inward force is 24 N because both the tension and the centripetal force act towards the centre. Which statement is correct? The resultant inward force is 24 N because the two forces act in the same direction. The resultant inward force is zero because the forces cancel. The resultant inward force is 12 N because the tension provides the centripetal force. The centripetal force acts outwards and balances the tension. Centripetal force is the resultant inward force, not an additional force. Your score is Restart quiz
