Wetsuits are prohibited in some triathlons due to the added buoyancy they provide the swimmer, essentially holding a greater portion of the body above the water and decreasing the power required to swim. If a given suit is made of
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- A passenger is standing on a scale in an elevator. The building has a height of 500 feet, the passenger has a mass of 80 kg, and the scale has a mass of 7 kg. The scale sits on the floor of the elevator. (It is an Otis elevator, so we will label it as "O" so as not to confuse its forces with those caused by the earth.) You may take g = 10 N/kg. For doing this problem it might be useful to start by drawing free-body diagrams for the passenger and the scale.Consider the vertical forces acting on the passenger and the scale WE→P: The force of the earth pulling down on the passenger (weight). WE→S: The force of the earth pulling down on the scale (weight). NP→S: The force of the passenger pushing down on the scale (normal). NS→P: The force of the scale pushing up on the passenger (normal). NO→S: The force of the elevator pushing up on the scale (normal). NO→P: The force of the elevator pushing up on the passenger (normal) a) While it is accelerating downward, which of the forces in your…arrow_forward3. A certain metal has a volume of 0.025 cu.m and when immersed in water, it weighs 500 N. Calculate the specific gravity of the object. 4. A piece of wood (sg = 0.60) 15 cm by 25 cm and 2.0 m long is floating upright in water. Determine the weight of iron, (sg = 7.8), in N, that must be fastened at the bottom of the wood such that 50 cm is above the water surface.arrow_forwardA balloon considered spherical is 30 feet in diameter. The surrounding air is at 60 degrees Fahrenheit and the barometer reads 29.60 inches of mercury. What gross load may the balloon lift if it is filled with (a) hydrogen at 70 degrees Fahrenheit and atmospheric pressure? (b) Helium at 70 degrees Fahrenheit and atmospheric pressure. Final answer:arrow_forward
- what is the buoyant force of a plastic cube with 5m side floating on water if half of the block is submergedarrow_forwardWhat height of mercury column is equivalent to 1000 kPa? The density of mercury is 14000 kg/m3.arrow_forwardWhat is the actual weight of a block when its weight in water is 200 N?arrow_forward
- Buoyance is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. The upward buoyant force is calculated via the following equation: Ff = PfgV V is the volume of displaced fluid (object), pf is the density of the fluid, and F, is the buoyant force.arrow_forwardBauge 260 mm of Hg. Explain the difference between these two pressures. 2. An aerostat balloon is filled with hydrogen. It has a volume of 1000m3 at constant air temperature of 270C and pressure of 0.98bar. Determine the load that can be lifted with the air of aerostat.arrow_forwardWhat is the depth of the liquid in a container if the specific weight of the liquid is 56 Ib/ft3, the container weighs 33 lb, and has a diameter of 63 in? A load cell measures the total weight to be 746 lb.arrow_forward
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