A stream of water flowing horizontally with a speed of 15 m s^1 gushes out of a tube of cross-sectional area 10^2 m2, and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assuming it does not rebound?

A elongation of 0.1% in a wire of cross-sectional area 10"6 m2 causes tension 100 N. The young’s modulus is

Calculate the force required to increase by 1% length of a rod of cross -sectional area 10^(-3) m [Y = 1.2*10^(12) Nm^2]

When a force is applied on a wire of uniform cross-sectional area 3×10 −6 m 2 and length 4m, the increase in length is 1 mm. Energy stored in it will be (Y=2×10 11 N/m 2 )

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with an uniform speed of 7 m s^-1 . It hits the floor of the elevator (length of the elevator = 3 m) and does not- rebound. What is the heat produced by the impact? Would your answer be different if the elevator were stationary?

Water is flowing steadily through a horizontal pipe of non- uniform cross-section. The pressure of water is 4xx10^4 at a point, where cross-section is 0.02m^2 and velocity of flow is 2ms^-1 . What is the pressure at a point, where cross-section reduces to 0.01m^2 ?

Water flows horizontally through a pipeline of varying cross-section. At two points A and B, the diameters are 0.6 m and 0.2m. The pressure difference between the points is 1m. Column of water. Calculate the volume of water flowing per second.

A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10^- 5 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10^-5 m^2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?

In a test experiment pn a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are 70 m s^-1 and 63 m s^-1 respectively. What is the lift on the wing if its area is 2.5 m^2 ? Take the density of air to be 1.3 kg m^-3 .

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm^2 . Calculate the elongation of the wire when the mass is at the lowest point of its path.