- c) State four limitations of Bernoulli's equation. (4 marks) d) For a hydraulic device, a piston has a cross-sectional area of 30cm^2moving an incompressible liquid with a force of 60 N.The other end of the hydraulic pipe is attached to 2^nt piston with a 60cm^2 cross-sectional area. Determine the force on the second piston? (2 marks) QUESTION SIX (14 marks) a) An object of mass 3 kg is attached to a string of length 0.4 m which will cut if the tension exceeds 300 N. The object is whirled in a vertical circle whose centre is 4.5m above the ground. The angular velocity is gradually increased until the string cuts. (i) In what position is this likely to occur and what is the angular velocity? (4 marks) (ii) What time will the stone take to reach the ground. (3 marks) (iii) Where will the stone hit the ground? (3 marks) b) State four examples of applications of circular motion in real life. (4 marks)
- eQuesucedo cuondo una mosade cire collente se encuentra con una masade are the? Las dos masas de oire se mezcian sin formar un frente. El aire frio se elevo sobre el aire caliente. formando un frente ocluido. El alre collente se enfrio ropidomente. formondo un frente into. Se forma un frente calldo yel alre collente se elevasobre el clue frie.
- 2. Which of the following is an example of Newton's Third Law? A. A ball rolling downhill. B. A person pushing a wall, and the wall pushing back. C. A car speeding up. D. A leaf falling from a tree. thingy cannot be created or destroyed.
- . Describe how varying the incline angle affects the force (if at all).
- 5. Highlight the correct response A force is applied to pull a cart up an inclined plane at a constant speed to the same final height. The force is exerted parallel to the inclined plane . As the angle of the incline is increased, the amount of force required to do the task __ and the work done when doing the task __ A. remains unchanged , increases B. increases , remains unchanged C. remains unchanged ,decreases D. decreases , remains unchanged E. increases , increases F. decreases , increases G. increases , decreases H. decreases , decreases
