Q1 - LEARNING ACTIVITY SHEET (LAS) 1 Name: SHS 11 - General Physics 1 Section: Directions: Read each question carefully and choose the letter of the best answer. Encircle but if you step on a single nail, it will go . right through your foot? the letter that corresponds to your answer. 1. Two fluids 1 and 2 have mass densities of A. There is more force exerted on a p, and p, respectively. If p, > p, , which single nail than the entire bed of nails. B. The force is the same in both cases, of the following expressions will represent but there is less pressure when you lie the relation between their specific on the bed of nails. volumes v and v? C. The force is the same in both cases, but there is more pressure when you A. v>V lie on the bed of nails. B. UCV, D. The area is the same in both cases, but there is more force when you lie C. D = V, on the nails. D. Cannot be determined 6. ' A beaker is filled with a liquid of density 2. How can the temperature affect the p up to a height h. If half the liquid is specific gravity of a substance? replaced by equal volume of another A. Mass of the substance changes with liquid of twice the density, what will be temperature the change in the base pressure? B. Rigidity of the substance changes with temperature C. Density of the substance changes with temperature P D. The temperature cannot affect the p 2 p Thiz specific gravity of a substance A. Increased by agh 3. With the increase in the weight of an B. Decreased by pgh object, the pressure will C. Increased by pgh/2 D. Decreased by pgh/2 A. increase B. decrease 7. What is the purpose of having cylindrical C. remain the same water towers above ground or water D. increase and then decrease tanks at the top of buildings? 4. A toy storage box is placed on a table. A. To store water for use by consumers How can you increase the pressure of the B. To displace water so less water is box towards the surface of the table? placed behind large dams in reservoirs. A. Remove the toys inside to decrease its C. To increase the volume of water, weight thereby increasing the water pressure B. Move the box on the end part of the in homes and apartments. table D. To increase the height of the water C. Add more toys on the box to increase column, thereby increasing the water its weight D. Add bun feet to the table to increase pressure in homes and apartments. the height of the table B. A hydraulic press has a ram of 30 cm 5. Why can you lie down on a bed of nails diameter and a plunger of 2 cm without having any nails break your skin, diameter. It is used for lifting a weightQ1 - LEARNING ACTIVITY SHEET (LAS) 1 SH5 11 - General Physics 1 Name: Section: of 35 k/. Find the force required at B. 9.8N the plunger? C. 11.76N D. 16 N A. 155.6 N B. 155.6 KN 13. The same body is immersed in two C. 2333 N D. 2333 AN liquids A and B in succession. The extent to which the body sinks In 9. Which of the following is true about the liquid B is less than in liquid A. What conclusion could be derived from hydraulic system? such an observation? A. The pressure exerted on a smaller A. The density of liquid A is more piston is greater than on the larger than liquid B piston. B. The density of liquid B is more B. The pressure exerted on a larger piston than A is greater than on the smaller piston C. The density of both liquids is the C. The pressure exerted on a small piston same. is equal to that on the larger piston. D. The density of solid is greater D. The pressure on a larger piston will than the density of liquid B but cancel out the pressure on the smaller less than in liquid A piston producing a zero net pressure. 14. Air is streaming past a horizontal 10. A force of 230 N applied on a hydraulic lift airplane wing such that its speed is raises an automobile weighing 6500 N. If 120 m/s over the upper surface and the applied force is exerted on a 7.0 m 90 m/s at the lower surface. If the piston, what is the area of the piston density of the air is 1.3 kg/m and the beneath the automobile? wing is 10 m long and has an average width of 2 m, then what is the A. 5. 0 x 10 m difference of pressure on the two sides? B. 0. 25 m C. 4.0m A. 4.095 Pa D. 1.97 x10" m B. 40.95 Pa C. 405.9 Pa 11. An object will remain suspended at its D. 4095 Pa present depth in a fluid if the 15. Water flows through the pipe that A. weight of an object is equal to the has a diameter of 4 cm at the buoyant force entrance and 2 cm at the exit. The B. net force exerted on the object is pressure drop across the pipe is equal to the buoyant force 2.7 x 10 Pa. Calculate the speed of C. volume of an object is equal to the water in a pipe. the volume of the fluid D. density of an object is greater A. 0.6 m/'s than the buoyant force B. 1.79 m/s C. 3.5 m/s 12. A wooden cube of sides 10 cm each D. 7 m/s dipped in water. Calculate the Bouyant force on the cube? A. 2.94N