The 70-kg boy slides down the smooth water slide. If he starts from rest at A, determine his speed when he reaches B and the normal reaction the slide exerts on the boy at this point. Fast A Y= 0.075x2 7.5m B

5.5

6.29 An open rectangular tank of dimensions 4m x 3m x 2m contains water to a height of 1.6m. It is then accelerated along the longer side. What is the maximum acceleration possible without spilling the water? If this acceleration is then increased by 10%, what amount of water will be spilt off? (a) 1.472 m/s? and 0.48m3 (b) 1.962m/s? and 0.48m3 (c) 1.472 m/s? and 0.52m3 (d) 1.962 m/s? and 0.52 m3

11. A cylinder of 125 mm radius rotates concentrically inside a fixed cylinder of 130 mm radius. Both cylinders are 300 mm long. Determine the viscosity of the liquid which fills the space between the cylinders if a torque of 0.88 N-m is required to maintain an angular velocity of 2 rad/sec. Assume the velocity gradient to be a straight line. rotating cylinder 300 mm 5mm 125 mm a. 0.13 Pa-s C. b. 0.15 Pa-s Pr d. fixed cylinder 0.17 Pa-s 0.19 Pa-s